The medic glanced at the clock. "Just over nineteen hours, sir."

"Wha-at? You dared to keep me off duty that long? I must report for

duty at once."

"Please, sir. No excitement. You must rest. Just a moment and I'll

call Dr. Green." With that the medic turned and fled.

As Dr. Green approached, Steve Elbertson was already on his feet,

swaying dizzily, white as a sheet, but perhaps the latter was more

from anger than from anything else.

"Major Elbertson. You received a severe dose of radiation. You are

under my personal supervision and will return to bed at once."

"Is the flare over?" Elbertson asked the question, although already

vaguely aware that the ship was again spinning, that he was standing

on the floor fairly firmly, and that, therefore, the emergency must be

over.

"Yes."

"In that case, sir, my duty is to my post on Hot Rod."

"Hot Rod's out of commission and so are you. I cannot be responsible

for the consequences if you do not follow my orders."

"Explain that, please. About Hot Rod, I mean."

"Why, it was struck by a meteor shortly after the flare last night. I

think I heard someone say that it burned out Thule Base before they

managed to turn it off."

Without waiting for more, Elbertson brushed past the doctor and headed

for the bridge.

The captain was startled by the mad-looking, unshaven scarecrow of an

officer that approached him, demanding in a near-scream, "What

happened? What have you done? What did you DO to Project Hot Rod? No

one should have tampered with it without my direct order! Captain, if

that mechanism has been ruined, I'll have them nail your hide to the

door!"

"Major!" The captain stood. "This may be a civilian post, but you are

still an officer and I am your superior. Return to your quarters and

clean up. Then report to me properly!"

For a moment there was seething rebellion on Elbertson's already wild

features. Then, automatonlike, he turned and walked stiffly away

without saluting.

But the stiffness left him as he passed through the door. Momentarily

he sagged against a wall for support, far weaker than he thought

possible for a man of his youth and what he thought of as his

condition. Making his way almost blindly to Security's quarters in

rim-section B-5, he staggered through the door and on towards the

latrine, shouting at Chauvenseer to "Get out of that sack and give me

a detailed report on events since the flare. Oh, and send somebody for

coffee--lots of coffee."

* * * * *

On the bridge the captain flipped the intercom to Dr. Green's station.

"Is Major Elbertson under the influence of any unusual drugs, doctor?"

he asked when he'd reached the medical staff chief. "Anything that

might make his behavior erratic?"

"Only sedatives, captain. And, oh yes, those new sulph-hydral

anti-radiation shots. We're not too familiar with what they do, though

the reports indicate the worst effect is a mild anoxemia, which

generally results in something of a headache. Of course, that's if the

quantity of the drug was precisely calibrated. They can be fatal," he

added as an afterthought.

"Would anoxemia cause a change in character, doctor?"

"It might. It might make one behave either stupidly or

irrationally--temporarily or permanently, depending on the severity of

the effect."

"Did Major Elbertson seem normal to you when you discharged him from

hospital?"

"I did not discharge him, captain. I ordered him to remain under my

care. But he seemed greatly upset, and short of force I could not have

kept him from leaving."

"I see." The captain paused, then asked: "Doctor, please consider

carefully. Would you consider Major Elbertson's condition serious

enough to warrant confining him to bed by force?"

"Probably not. He should come out of it in a few hours. Exercise may

possibly be good for him, though I doubt if he's capable of much of

it." The doctor chuckled as though at a private joke with himself,

then added, "He's really quite weak physically, you know, even without

the after effects of radiation and drugs."

"Thank you, doctor."

* * * * *

Back in his quarters, Elbertson was refusing to admit to himself the

fact of his own weakness. He had been quite ill in the shower, had

managed to slash himself rather badly with the razor while shaving,

but was now smartly attired in a clean pair of the regulation

coveralls, with the insignia of his rank properly in place--and so

weak he could hardly move.

The coffee hadn't helped much.

The briefing had helped even less. The major knew himself guilty of

negligence while on duty. Inadvertently, but as though by his very

hand, certainly through the agency of some saboteur he had failed to

spot, his weapon had been turned on his own troops at Thule, key post

in the plan.

It was possible that the entire plan had been sabotaged, though that

seemed quite unlikely. Its ramifications were too great. So long as

Hot Rod still existed, was still within their reach, the plan was

operational.

The nonsense about a magneto-ionic effect he discarded without

hesitation. Obviously it was sabotage, possibly by someone with a plan

of his own, more probably by someone in the pay of one of the big

power companies that would like to see the operation at least

postponed. Obviously--he gave up.

Nothing would be obvious until he knew in exact detail what had

occurred, what the plans of the enemy would be, where next they would

strike--and who was the enemy.

But that last, at least, was almost obvious. Who else, but the man who

had carried the political battle, against all odds, that Hot Rod be

created? Who else but Captain Naylor Andersen could possibly have

delivered this sneaking, underhanded attack against himself and his

comrades?

Who else, he thought, but a man so callous as to order _him_, sick as

he was, as though he were a mere cadet, to leave the bridge.

Major Elbertson's mind was made up as to the identity of the enemy.

But he would have to proceed with care, or he would key the plan

before the time was ripe. There must be no great shake-up in

personnel, or undue attention from Earth to the potentials of Project

Hot Rod.

Perhaps the saboteur's cover-story of a magneto-ionic effect would

serve his ends as well--at least until his comrades on Earth signaled

that the time was ripe.

Yet now that Hot Rod had proved its power, the time was ripe. It was

that proof on which the plan had waited. And perhaps this very

sabotage would prove to be the "incident" on which the plan hinged....

Even as he fought to clear his normally organized mind of the

weariness of his body that now sapped at its strength, the call came.

Chauvenseer appeared at his side, saluting smartly. "Com Officer

Clark, sir, reports a message from Earth. _The_ message, sir. 'Begin

Operation Ripe Peach.'"

Major Elbertson pulled himself to a military stance, returning his

aide's salute with complete precision.

Briefly he considered gathering all his men, all the Security

personnel, and storming the bridge.

No, obviously the enemy was organized--an unforeseen circumstance.

Obviously the captain was not alone. Obviously _his_ men included at

least some of these slipstick boys--and he would command the loyalty

of them all, since he was somewhat of their ilk himself.

No, an officer must seek the most advantageous position from which to

deliver his ultimatum.

He must use Hot Rod itself to control them. If Hot Rod itself were

actually sabotaged, then the plan must wait until he could have it

repaired. He doubted it was hurt.

The flare had thrown off all original sequences--but perhaps that was

to his advantage.

To Chauvenseer he snapped: "This is the detail of our immediate

operation. Get four of our best men besides yourself. Have each of

them come separately and unobtrusively to the south polar lock, where

I will meet them. I will bring Smith with me.

"Have each of the others take his assigned post for Operation Ripe

Peach--but order them to take no action other than to prevent anyone

on board from doing anything unusual that might be an enemy

operation--until I alert them that Operation Ripe Peach is

operational.

"Their orders will, of course, come on our personal radios, Security

Band 2Z21.

"Execute!" he ended, saluting smartly.

* * * * *

As the Security squad moved, with individual secrecy, towards their

various posts, Captain Andersen was considering that Elbertson would

probably snap out of it as soon as he had had coffee and a shave. The

man had probably been severely affected by the drugs he had been

given. He would make no further reference to the incident of erratic

behavior, unless it continued.

[Illustration]

Bessie, having at the moment nothing else to do, was busily plying the

Sacred Cow not only for her own horoscope for the day, but also those

of the several persons of whom she was most fond, while carefully

keeping a shielding bunch of paper work in a place to make it appear

that she was officially busy. The captain's horoscope, she

recognized, didn't look much worse than the rest of them, but was

definitely the worst. One of those mathematical jumbles that somehow

didn't interpret clearly. None of them looked very good today.

Out on the rim, things were getting back to normal. The labs were

functioning again, most of them according to their assigned, routine

procedures; but in some, heads were drawn together over the absorbing

diagrams supplied by Mike and Ishie.

Mike and Ishie themselves had already put in twelve hours almost

without a break. Working under stress, neither of them had remembered

to eat.

There was a cough at the entrance to the machine shop, and Dr. Millie

Williams' soft voice said "May I come in?"

The two looked up as the slender figure of the dark-skinned biologist

entered the lab, balancing "trays" with plastic bottles atop.

"If I know you, Dr. Ishie; and you, too, Mike--you haven't eaten," she

said with a smile. "Now, have you?"

"Millie," said Mike, "you've just reminded me that I'm as hollow as a

deserted bee-stump after the bears get through with it!"

"Little Millie," said Ishie, looking up at the figure nearly as tiny

as his own, "you must be telepathic as well as beautiful. Confusion

say 'Gee, I'm hungry!'"

"I'm told that the fate of the satellite depends on you two," Millie

smiled. "I thought I'd just give our fate a little extra chance. Now

drop what you're doing and light into this.

"After that, if you've got a job for a mere biologist, I've got my lab

readied up where it can last till I get back and--I'm not bad with a

soldering iron. Meantime, why don't you let Paul and Tombu go eat

while you eat?"

"Good idea," said Mike. "You two. You heard the lady. We gotta give

our fate the benefit of victuals. Scat."

* * * * *

As soon as the physicist and the engineer were settled to the plastic

containers of food and coffee she had brought, wolfing them down

hungrily, Millie opened up.

"While we're alone, I'm going to speak my piece," she said. "You two

will do me the honor of not taking offense if I say that you have the

most brains and the least consciences aboard--and I happen to share

the latter characteristic."

The two looked up guiltily and waited.

"Now don't stop eating, for I'm not through talking," she said. "That

magneto-ionic effect canceler you dreamed up would probably cancel the

six hundred forty pound magneto-ionic effect pull you dreamed up--if

such a thing existed.

"What I want to know ... don't stop eating until you've decided

whether you're going to let me in on your game or not ... is what

really does exist? I might be of some help, you know."

"But--" Mike and Ishie simultaneously choked over their food, looked

at each other, and then Mike blurted out, "but how could _she_ know?"

"Don't worry," said Millie. "I'm probably the only one. It takes a

person with little conscience and much imagination--takes a thief to

catch a thief, I mean--yes, I think I mean that quite literally.

Besides, I can help with some of that glassware that disappeared out

of my supplies several days ago. Oh yes, I knew it was gone and where

it went--but I figured any purpose you had was a good one, Ishie.

"But for how I personally canceled the idea of your magneto-ionic

effect from the flare--it just happens that last night I was curious

while everybody was asleep. When Bessie first came on duty this

morning, I offered to relieve her while she had a cup of coffee, and I

got a half-hour all by myself with the Cow. The captain wasn't up yet.

Her console's so simple anyone with a basic knowledge of computers and

cybernetics could figure her out.

"Practically the first question I asked--something about our

orbit--the Cow told me that the information was top secret, and to get

it I must go to the proper channel and identify myself as Mike. I

started to intercom you, Mike, to tell you that your machinations were

showing, but Bessie came back about then. I hung around to see what

would happen, and pretty soon Bessie asked the Cow about the same

question--but instead of getting the same answer, the Cow told her

that an external magneto-ionic field was pulling us out of line.

"So I went up to your engineering place. I rather thought you'd like

to know what the Cow had told me--but Dr. Ishie was there, and so

instead I went about my own business until I could figure things out.

"Now I couldn't figure things out. But I could figure there's a monkey

wrench somewhere--and since the two of you have been sticking together

like Siamese twins, I know it will be perfectly all right to ask you

in front of Ishie.

"Now," she finished, "do I get my girlish curiosity satisfied? You

don't have to tell me. I'll just keep on being puzzled quietly and

without indicating the slightest magneto-ionic dubiousness, if you'd

rather. But I might be helpful; and I _would_ like to know."

"Confusion say," Ishie declared through the side of his mouth, "that

he who inadvertently puts big foot in mouth is apt to get teeth kicked

loose. We are very lucky, Mike, that it was Millie who asked the

question of the Cow at that time. Besides, we've got to tell somebody

sooner or later. We can't just run off by ourselves.

"Yes, Millie, I think you have a job," he said. "Your help here will

be appreciated, of course. But what we really need is a way of

bridging the gap between ourselves and the rest of the personnel

before it gets too wide. How's your P.R. these days?"

"That's something I learned in a hard school, public relations," she

answered nonchalantly. "De-segregation was just beginning when I was a

girl back in Georgia. But maybe I'd better know what the gap is."

* * * * *

The two began to talk, interrupting each other, incoherently

outlining the Confusor and the various forces it exerted, and

the--what Mike kept calling the inertial fish hook.

Finally Mike took over. "To put it simply," he said, "our pet didn't

do at all what we expected--it hooked in on inertia and it took us

off. A confusing little Confusor--but Millie--it's a space drive! A

real, honest-to-gosh space drive!"

Millie gulped. It was far, far more than she had expected. Perhaps

this was another form of disguise like the magneto-ionic....

"Are you sure?" Then she answered her own doubts. "Of course you're

telling the truth now. That's not something you two would play games

about." Then in awe--"You've really got it!"

"But why, then," she said, uncomprehending, "are you hiding it?" But

before they could answer, she answered her own question again. "You'd

have to. Of course. Otherwise it'll be strangled in red tape.

Otherwise nobody'll let you work on it any more, except as head of a

research team stuck off somewhere. Otherwise, Budget Control would

take it over and make a fifteen-year project out of it--and the two of

you will probably have it in practical operation...."

She looked at the molds and wiring taking form all across the machine

shop.

"Oh, no! You'll have it in operation--soon!"

"Yes, soon--and we hope soon enough." Ishie sighed, then grinned

impudently. "There is," he said, "the little matter of the fact

that--in all innocence but nevertheless quite actually--we wiped out

Thule Base.

"If we don't get the big Confusor in operation very soon, it may be

that we shall spend a good deal of time in Earth's courts proving our

innocence while someone else botches most thoroughly the job of

creating a Confusor that could take us to the stars. And that," he

added mournfully, "neither of us would enjoy. We might not even be

able to prove our innocence, for there would be many very anxious to

prove us sufficiently guilty to keep us out of the way for many years.

"So you see," he said, "you have a very real P.R. problem. Our

assistants here could work better if they knew what they were doing.

The people aboard the wheel would be most excited by a space drive,

and would give us every aid.

"But what the law says, it says--and the captain would have no choice

but to put us in irons if he heard, though I think our captain is such

that he would not want to do it.

"We must tell everyone what we have, for where the wheel takes us,

they will go. But we can't tell them, for if we tell anyone, it will

get back to Earth--and we murdered Thule, according to the law of

Earth.

"It is a very neat problem," he said.

* * * * *

Major Steve Elbertson arrived first at Project Hot Rod, and trailing

behind him on their scuttlebugs, the other six men.

As he slipped through the lock and out of his spacesuit, he reached

down the neck of his coveralls and carefully extracted the Security

key in its flat, plastiskin packet, from between his shoulder blades.

At least the villainous captain had not gotten his hands on this, he

thought, and whatever damage had been done to Hot Rod probably could

be quickly repaired.

He had heard of the hunt for the key, and been silently amused, though

he had volunteered no information to his briefing officer,

Chauvenseer.

Stepping forward as briskly as a sick rag doll, he fitted the key into

the Security lock and snapped open the bar that prevented Hot Rod's

use.

As the others entered, he turned to them. Supporting himself against

the edge of the console and managing to look perfectly erect and

capable despite his weakness, he said: "I have instructed each of you

to learn as much as you could of the operation of this device. It is

now necessary that the civilian scientists," he pronounced the

"civilian" as though it were a dirty word, "be relieved of their rule

over this weapon, and that the military take its proper place, as the

masters of the situation. I trust each of you has learned his lessons

carefully, because it is now too late for mistakes--although we have

with us assistance far superior to that of the civilians.

"Gentlemen," he said, and his voice took on power as he talked, "it is

a pleasure to re-introduce to you a companion whom you have known as

Lathe Smith.

"This, gentlemen," he said formally, gesturing one of the men forward,

"is the Herr Doktor Heinrich Schmidt, of whom you would have heard

were you familiar with the more erudite of the developments of space

physics.

"Dr. Schmidt," he added, "it is a pleasure to be able to again accord

you the courtesies and respect that are your due.

"Now for myself," he continued, "it may surprise you to know that I,

too, have a somewhat more advanced rank than you have suspected."

Deliberately he unpinned the major's insignia that he wore, and

brought out a sealed packet, opened it, and pinned on four stars.

"Gentlemen," he finished, "may I introduce myself? General Steve

Elbertson, commanding officer of all space forces of the United

Nations Security Forces.

"Now," he said briskly to his astounded men, his voice crackling with

authority, "take stations.

"Dr. Schmidt will key in the number one laser bank only. You will

select as your target area that area through which the passenger

spokes of the wheel pass. These will each in turn be your targets if

it becomes necessary to fire.

"Dr. Schmidt has advised me that, should it become necessary to fire

on the hub, the resultant explosion of the shielding water will wreck

the big wheel.

"If we should miss and hit the rim, the resultant explosion would

inevitably wreck both the big wheel and Project Hot Rod.

"Therefore, gentlemen, I caution the most accurate possible aim.

"And Dr. Schmidt, will you connect the storage power supply you have

readied, please?"

Quickly then, he slid into the communications officer's seat, as the

Security officers assumed each of the four major posts of the project,

while Chauvenseer took up a stance at his general's right hand, ready

to respond as directed.

* * * * *

On the bridge, Captain Nails had been annoyed. Too many queries from

people who really didn't have authority over his satellite. Too many

directives and counter-directives were flooding at him from various

officials on Earth.

Some one down there even had the temerity to suggest that Security

take over--not officially, just sort of take over.

If that didn't take the cake, he thought. Trying to put that crumb

Security officer into command, _real_ command, of a scientist? Over

HIS people? Never!

And just because somebody had a wild idea about sabotage--after all,

the whole thing must be some sort of effect or accident. Why couldn't

they leave people alone long enough to find out what was really going

on?

And where was Elbertson, anyhow? The man had had plenty of time to

freshen up. Possibly he had caved in some place. The medic had said he

was sick. But even so, I'd best check, he thought.

Reaching for the intercom switch that would give him a private line to

Security quarters in the rim, his gaze happened to fall on the panel

that still displayed Hot Rod on its taut cable--

--And seven figures riding the end of the cable to the air lock.

Elbertson, of course, he thought furiously. And taking his men out

when the proton level was still too high to go beyond the rim

shielding....

Then the captain stopped in mid-thought. This was no idle act of a man

feeling the effects of drugs.

He switched the intercom quickly to the Hot Rod crew's quarters on the

rim. "Dr. Koblensky!" he almost shouted into the mike.

"Just a minute, sir," came the answer, and seconds that seemed like

eternities passed before the doctor's calm voice answered, "Dr.

Koblensky speaking."

"Did you know that seven men were going out to Hot Rod?"

"Of course not. They mustn't...."

The captain switched off and changed to the intercom for the machine

shop. "Dr. Ishie. Mr. Blackhawk. To the bridge on the double. _Fast_,"

he said.

It might not be the saboteur, he thought, but the chances looked

grimly real that Earth was right--that the whole thing was sabotage,

and those were the seven saboteurs. While he waited, he checked the

Security quarters for Elbertson. The major was not there, nor was he

in the hospital.

Elbertson, he thought. I've been blind.

He decreased the magnification of Hot Rod so that the entire project

showed.

Mike arrived first, almost skidding to a stop at the captain's

console, Ishie right behind him.

"The saboteur--seven men that I believe to be saboteurs--are aboard

Hot Rod," the captain told him crisply. "Can they activate it?"

"Captain, there's no saboteur...." Mike began, but the captain

interrupted.

"Gentlemen, I'm not asking you to be the judge of that. If they are

saboteurs, is there any way that they can activate Hot Rod?"

"Oh, they could have storage batteries aboard, I suppose." Mike didn't

even pretend to be excited.

"Then we will assume they have, Mr. Blackhawk." The tone of the

captain's voice told Mike he'd better darned well believe in those

saboteurs or tell the captain the truth--and that quickly. "Now,

assuming Hot Rod can be activated, we will also assume that their

first aim will be to control the wheel. They would, therefore, aim at

the hub and issue an ultimatum."

"They might aim at a target on Earth, and issue an ultimatum to us."

Mike would play the game.

"No. We would refuse such an ultimatum. They would aim at us. Can you

prevent that?"

Mike thought hard. He'd better come up with an answer to that one,

saboteurs or no.

"If they shot through the hub, they'd hit our shielding water and

explode the hub-hull. That would wreck the wheel, and they'd need the

wheel. The only place they could safely shoot us would be the

passenger spokes, and that would take some pretty fine target

shooting--with only one laser bank. They could do it though," he said

thoughtfully.

"Assume, Mr. Blackhawk, that if they couldn't hit the passenger

spokes, they'd be willing to destroy the wheel in order to gain

control. Is there any way to prevent that?"

Mike stood completely silent for almost a minute. Then he grinned.

"Sure," he said. "If we turned the rim towards Hot Rod, they couldn't

fire into the rim without hitting that shielding--and that would

create an explosion, even from their smallest possible shot, that

would almost inevitably take Hod Rod with it. If we turn the lab so

that only the rim is towards Hot Rod, it's suicide to shoot us."

"You will swing the rim of the wheel into that alignment as rapidly as

it can possibly be done." The captain's voice practically lifted the

two men off the bridge, and they were on their way to the engineering

quarters with every appearance of the urgency they should have felt if

they had not known who--or rather what--was the real saboteur.

* * * * *

Then Mike heard Ishie's soft voice from behind him, slightly

breathless. "At that, you'd better swing the rim and swing her fast,

Mike. The captain sure 'nuff believes in his saboteurs, and it's just

possible they're real."

O.K., thought Mike, and really moving now he reached the engineering

quarters a good ten strides ahead of his companion.

As he entered the open bulkhead lock he saw a man that he recognized

as one of the Security personnel, and brushing on past him said, "If

you want to see me, come back later. I'm going to be very busy here

for a while."

Mike headed for the panel that controlled the air jets and other

devices that spun the wheel.

The Security man didn't hesitate. Seeing the ship's engineer about to

make important--and possibly subversive--adjustments, he drew his

needle gun and aimed it squarely at Mike's back. "Halt--in the name of

Security!" he barked.

Slowly Mike swung around, eying the man coldly, and began a question.

But there was no need. Dr. Chi Tung, having seen what was going on

through the lock before he entered, had held back just long enough for

the Security man to turn fully towards Mike. Now he launched himself

through the lock like a small but well-guided missile, and arriving on

the Security guard's back, had his gun-arm down and half broken before

the man knew what was happening. Had he been alone, it is possible

that the larger man might have won. But Mike had never been fond of

people who pulled guns on him, even if they were only sleepy guns.

Between the two of them, the Security guard was lucky not to lose his

life in the first two seconds of battle.

The conflict ended almost before it had begun, with a meaty slap of

Mike's fist connecting with the man's jaw, right below the ear. It

hadn't been a clean punch, Mike thought, but then he wasn't really

used to fighting in this gravity. Anyhow, the man was out.

And now came the question of what to do with him, but Mike left that

to Ish.

He turned back to the precession panel a bit more convinced that

perhaps the captain had been right--perhaps there were enemies aboard.

The precession controls, though operational, had not to date been

required. Carefully, Mike switched the sequence that would put them

into active condition but not operate. That was left to the Cow.

Turning to the vocoder panel, he directed the Cow to take over control

of the now active precession equipment; to use the sun as a referrant

for the axis of precession, and to move the pole ninety degrees in a

clockwise direction around that axis of precession.

Under these directions, the big wheel began to turn, not as it had

been turning, but sideways. The operation would take ten minutes, and

the axis of this new turn would be aligned directly on Sol by the

computer.

The Cow's help in such a maneuver was required, because the precession

could only be accomplished by switching valves between the tanks of

the rim in such a manner that water was switched north on one side of

the wheel, and south on the opposite side of the wheel, and the points

of this switching between the tanks must remain in a stable position

relative to the spin of the wheel. The valves that accomplished this,

seventy-two of them, were spaced at intervals of five degrees around

the rim, but only two out of the seventy-two could be active at any

time; and these must be selected by the computer's controls so that

always the precessive force was properly aligned to produce the

required precession.

When the precession was finished, the rim of the wheel would be

aligned, still with the sun, but also with Project Hot Rod which had

been to their south.

As a third thought, Mike switched off the Confuser.

Having set up the necessary factors, Mike turned back to the problem

of the Security guard, or saboteur, whichever he might be, but found

this problem had already been well taken care of. Not satisfied with

simply tying the man up, Ishie had bound him with wire to somewhat the

resemblance of an Egyptian mummy, and then for added good measure,

given him two sleepy shots with his own needle gun; put electrician

tape across his mouth; and taken from him everything he could possibly

use either as a method of communication or as a weapon.

At least, Mike thought, Ishie is a thorough workman when he sets his

mind to it.

Having parked the Security man in a nearby tool locker, with the

feeling that he would keep for a while there, Ishie turned back to

Mike with a grin.

"Confusion say those who play with firearms should be cautious! Mike,

this convinces me. I've heard snatches of what's going on on Earth,

and it looks like somebody is putting over a fast one down there.

Seems like maybe our own Security boys are part of it. They would be

the ones the captain saw going out to Hot Rod. And that means they've

got a purpose out there. Is good to know they can't shoot us now, at

least in a few minutes now, without getting themselves shot back. But

they can shoot at Earth. Any ideas?"

"Well ... I thought some time ago that there was a little fallacy

involved in that project when I saw how they hung the beam-director

way out in front on those little old balloon-poles. They've got 'em

bent, and if any one or two of 'em should happen to get punctured, the

other two would move the mirror complete out of the laser beam focus.

Then the only thing they could shoot would be the sun--and I don't

think it'd care.

"Ishie, you stay here just to keep the home fires burning and make

sure that nobody fiddles with anything we don't want 'em to. All of

the bulkheads leading into this section can be locked from the

inside--a feature I haven't seen fit to point out to other people who

really don't need to know."

* * * * *

Walking around the floor, Mike carefully secured the four bulkheads,

two leading back to the morgue; two leading forward to the north pole

end of the hub. And then, jumping catlike upward and grasping the

access ladder to the central axis tube, he carefully bolted that one,

too.

[Illustration]

Dropping back to the floor he stepped over to the intercom and

switched in Captain Nails' circuit.

"Mission accomplished, sir. And you were quite right. One of our

_Security_ servos is off balance. I'm attending to the matter."

"Thank you, Mr. Blackhawk." The captain's voice was calm, quite unlike

the voice he'd used to them on the bridge. "You would do well to

listen for the ... sound ... of those servos." The captain's voice

stopped but the intercom continued to hum, alive from his end.

"Ishie," said Mike, "the captain's in trouble, and he's asking us to

listen in on what goes on the bridge. He's left his intercom open.

"Now I've got a mission to accomplish; and you can't leave here,

because this post's got to be operational. But you can listen and do

whatever the captain tells you.

"And, Ishie--if anybody takes the bridge away from the captain, you

tell the Cow not to obey any orders or answer any questions unless

they come from here."

With that, Mike leaned over, loosened an inspection plate in the

floor, and climbed down a ladder through the inspection tube that led

through the six feet of normal-shield water directly beneath the floor

into the seventeen-foot flare-shielding chamber beyond. This was the

tank which surrounded the hub and held all of the waters of the rim

during flare conditions; but was now holding only the air supply

which, during a flare, was pumped to the rim.

Making his way back towards the center of the hub, Mike considered his

luck in being one of the people most familiar with the entire

structure of the ship. It would be unlikely that enemies operating

aboard would think to cut off the air and water passages, or even keep

them under surveillance. Nevertheless, he would be cautious.

He must now get to the machine shop, and enter it without triggering

any more of those--he laughed quietly to himself--Security servos.

The particular tank he was in he had selected carefully. Of the

twenty-one possible combinations, this one he knew would bring him

into the water under the north hall that circled the outer rim.

In a few strides he reached the three-foot-diameter spoke tube through

which the flood of water would pour during a draw-in action such as

that they had had during the flare; let himself over the side head

first, let go and began falling down the seventy-nine foot length of

the tube, accelerated by the light pseudo-gravity of the spin. Even

so, he spread his legs and arms against the walls of the tube to act

as a brake, so as not to arrive with too much impact at the bottom of

the tube.

As he hit the water at the bottom, the tube swung around the

circumference of the rim to the point at its far side at which it

entered its particular river.

The course of his dive carried Mike to the bottom of the curve, and he

started crawling up its far side to where the tunnel entered the

rim-river. There the motion of the fluorescent-lighted water caught

him, and he was swirled quickly to his target, twenty-five feet along,

inspection plate B-36. He grabbed the hand-hold by the plate before he

swirled past, loosened the plate, lifted it only enough to be sure

that the room was empty, and then pushed it off, pulled himself

through, and emerged into the whining dimness of Compressor Room 9,

next to the machine shop. The low whine assaulting his ears was that

created by the air compressors that fed the jets that drove the waters

through the rim.

Stepping over to the wall locker, Mike took out a dry pair of shorts,

a T-shirt, and moccasins, kept there for the purpose of making changes

after such swimming inspections of the rim tanks.

* * * * *

Before entering the machine shop, Mike spotted the Security man

through the open bulkhead--just standing there while Paul and Tombu

grimly worked on; and Millie sat idle, watching.

Mike entered the machine shop casually, as though intent on business,

brushed past the Security man, and stepped over to the tape-controlled,

laser-activated milling machine as though to inspect its progress.

Then, as though finding an error, he halted its operation and swung

the laser-head back away from the work piece.

The head swung free in his hand, attached to the machine but

nevertheless free. Casually, without even looking at the Security man,

he had somehow centered the laser directly on him. Just as casually,

he stepped to one side.

"The beam from this machine is quite capable of milling the hardest

materials," he said, still casually, as though to himself. "Even a

diamond can't withstand it."

Now he looked directly at the Security guard. "It's capable," he said

in an even tone, "of milling a hole right through your guts if you

even to much as breathe too deep."

Then to Chernov, "Move around behind him, out of range of this beam,

and secure the man please. Millie, is there any thing in your

department that will make sure he won't talk for while?"

"Yes, Mike, but I don't think I'd better go there right now. There

aren't many of them, but these boys seem to be spread out all over."

Chernov had the gun now; and the personal communicator from the

Security man as well.

"O.K.," said Mike. "I don't think he can give us much trouble in

there," pointing at the air-lock bulkhead through which he had just

entered. "We can go in and out through the physics lab," he said.

"Best we shut that off now before some more of these boys wander

along."

When both the lab and the Security man were under control, Paul

Chernov turned to Mike. "That milling-laser," he said. "It's got a

focus of about six inches maximum. How did you fix it so it could burn

the guard at that distance?"

"I didn't," said Mike briefly. "He already knows that lasers can reach

from here to Earth. Why should I bother to tell him any different?"

Turning to Tombu he handed him the Security man's radio. "See if you

can rig this," he said, "to broadcast everything they say over the

general intercom channel. It's about time we let people know what's

happening."

* * * * *

It took Tombu only minutes to hook in the radio. As he turned it on,

Elbertson's voice came over the loud-speaker system. A roll call of

Security men was apparently being completed. The last three man

responded as called.

The Elbertson's voice, crisp but somewhat labored, came over the

Security beam, booming throughout the ship. "It is obvious that the

renegade scientists and engineer of the wheel have replaced the men

guarding their sectors.

"As we were informed, the captain had put them in charge. Since they

struck the first blow, it is now up to Security to converge on them

and eliminate them.

"Jones, Nackolai and Stanziale are detailed to the Dr. Chi mission.

Nilson, Bernard and Cossairt are detailed to get the Indian. The rest

of you will take over where you are posted, and secure all personnel

to their quarters.

"Clark. Drop your cover and take over control of the bridge.

"I expect to have Hot Rod operational within five minutes. And Clark.

Instruct the computer to discontinue precession operations that have

been initiated.

"Take whatever measures are necessary to carry out these

instructions.

"This is no longer an undercover operation, gentlemen. Security is

taking control.

"This is war."

* * * * *

As the last sentence came over the loud-speaker, Mike sprang to the

intercom. He quickly keyed the direct line to engineering.

"Ishie," he said, "I gather you're safe?"

"Yes, Mike. Situation here very secure. I heard announcement of

conflict. You need not tell me to put the Cow under our control. It is

done. She will obey no one else until further instructed from here. I

didn't instruct her to obey only instructions by me, Mike, because we

are all expendable now."

As he finished speaking, the intercom went dead. Obviously the

communications officer, as his first act, had turned off the central

intercom power system under his control.

* * * * *

On the bridge, from the time that Mike and Ishie had left, the picture

of what was occurring had grown more ominous by the minute.

More than the vague, official messages had been flooding in from

Earth.

At the captain's command, the communications officer had opened up a

channel for news broadcasts, and put it on the speaker so they could

all hear.

The news round-ups indicated that various elements and factions in the

world below had had their say--each more vicious than the last.

From an original rumor of a minor space disaster, it had become a

tremendous accident that had wiped out Thule Base and left a smoking

ruins of Greenland.

From this it had become--possible sabotage.

From this, a direct, unprovoked attack by the scientists on Earth

itself.

Suddenly statesmen were standing forth in the U.N., condemning the

actions of country after country that had made possible the great

wheel; and just as suddenly, word had been announced:

Earth would be protected. The U.N. would act.

The U.N., it suddenly was found, controlled the majority of all

weapons on Earth; controlled the majority of all armies, navies, and

all stockpiles of ships and planes and ammunition that it had so

boastingly told everyone that it had scrapped.

The honeyed phrases of a few years before that there would always be

peace on Earth, and that the U.N. had taken the bite out of war,

changed; and the individual nations were now forgotten.

Now the U.N. itself was the military power; and now it would be U.N.

telling others what to do.

Mobilization would be declared. A war footing for the economy.

Everyone must fight back against the insane scientists above with

their inhuman weapon.

With appalling swiftness, where apparently nothing had been before, a

military force stepped forth in full armor to grind man's hopes for

freedom under an iron heel while waving its fist at the stars.

At first there had been voices crying out against this monstrous

action, this unbelievable birth, in the U.N. Assembly. But the voices

had become fewer and fewer, weaker and weaker, and in a matter of

hours had been drowned out.

Amazingly, even now, there were one or two who stood up in an attempt

to stem the tide; but they were ignored, and a ninety-eight per cent

favorable vote was cast.

The U.N. Security Forces had been granted dictatorial powers.

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