The way he asked told Forster at once that the youngster knew nothing about it.

"Er—just some half-baked idea out of the Pentagon. Some colonel trying to justify his existence." He clutched the box to him as though Summerford might try to take it away. "The tank's all yours."

He turned and clambered out of the chamber. He put the box down on the concrete floor, and climbed out of the pressure suit, watching the box all the time. It seemed to gleam up at him, as though it had eyes, full of silent menace.

He realized vaguely that Summerford was standing in front of him again, looking anxious.

"Are you quite sure you're okay?"

"I'm fine," Forster said, hardly recognizing his own voice.

He picked up the box and stumbled out, heading for his office.

When he walked in, his secretary was answering the line fitted with a scrambler, which connected directly with the Pentagon.

"General Morganson," she said, handing him the receiver.

Forster took the receiver, sat down at his desk and took a deep breath, fighting hard to regain his self control.