in
front of you--brave, intelligent men, who blasted through the atmosphere
with a piece of metal under them for a spaceship and a fire in their
tail for rockets. But everything they accomplished goes to waste if the
unit can't become a single personality. It must be a single personality,
or it doesn't exist. The unit is the ultimate of hundreds of years of
research and progress. But you have to fight to create it and keep it
living. Either you want it, or you get out of the Academy!"

Captain Strong turned away momentarily and Tom and Astro looked at Roger
significantly.

"Stand to!"

The three boys snapped to attention as the wide-shouldered captain
addressed them again.

"Tomorrow you begin to learn how to think as a single brain. To act with
combined intelligence as one person. You either make up your minds to
start tomorrow or you report to Commander Walters and resign. There
isn't any room here for individuals."

He stepped to the door and paused.

"One more thing. I've been given the job of making you over into
spacemen. I'm your unit commander. If you're still here in the morning,
I'll accept that as your answer. If you think you can't take"--he
paused--"what I'm going to dish out, then you know what you can do. And
if you stay, you'll _be_ the best unit, or I'll break you in two in the
attempt. Unit dis ... missed!" And he was gone.

The three cadets stood still, not knowing quite what to do or say.
Finally Tom stepped before Astro and Roger.

"Well," he said quietly, "how about it, you guys? Are you going to lay
off each other now?"

Astro flushed, but Roger eyed Corbett coolly.

"Were you really taken in with that space gas, Tom?" He turned to the
shower room. "If you were, then you're more childish than I thought."

"A man died to save another man's life, Roger. Sam Jones. I never knew
him. But I've met Captain Strong, and I believe that he would have done
the same thing for Jones."

"Very noble," commented Roger from the doorway.

"But I'll tell you this, Manning," said Tom, following him, fighting for
self-control, "I wouldn't want to have to depend on you to save my life.
And I wouldn't want to be faced with the situation where I would have to
sacrifice mine to save yours!"

Roger turned and glared at Tom.

"The Academy regs say that the man on the control deck is the boss of
the unit. But I have my private opinion of the man who has that job
now!"

"What's that supposed to mean?" a