Tom thought for a moment of the pitiful little mining rig that Roger Hunter had taken out to the Belt ... the tiny orbit-ship to be used for headquarters and storage of the ore; the even tinier scout ship, Pete Racely's old _Scavenger_ that he had sold to Roger Hunter for back taxes and repairs when he went broke in the Belt looking for his Big Strike. It wasn't much of a mining rig for anybody to use, and the dangers of a small mining operation in the Asteroid Belt were frightening. It took skill to bring a little scout-ship in for a landing on an asteroid rock hardly bigger than the ship itself; it took even more skill to rig the controlled-Murexide charges to blast the rock into tiny fragments, and then run out the shiny magnetic net to catch the explosion debris and bring it in to the hold of the orbit-ship.... Tom Hunter scowled, trying to shake off the feeling of uneasiness that was nibbling at his mind. Asteroid mining was dangerous ... but Dad was no novice. Nobody on Mars knew how to handle a mining rig better than Roger Hunter did. He knew what he was doing out there, there was no real danger for him or was there.... Roger Hunter, a good man, a gentle and peaceful man, had finally seen all he could stomach of Jupiter Equilateral and its company mining policies six months before. He had told them so in plain, simple language when he turned in his resignation. They didn't try to stop him ... a man was still free to quit a job on Mars if he wanted to, even a job with Jupiter Equilateral. But it was an open secret that the big mining outfit had not liked Roger Hunter's way of resigning, taking half a dozen of their first-rate mining engineers with him. There had been veiled threats, rumors of attempts to close the markets to Roger Hunter's ore, in open violation of U.N. Council policies on Mars.... Tom fought the wheel as the big tractor lumbered up another rise, and the huge plastic bubble of Sun Lake City came into view far down the valley below. He thought of Greg. Had Greg been summoned too? He closed his lips tightly as a wave of anger passed through his mind. If anything had happened, no matter what, he thought, Greg would be there. Taking over and running things, as usual. He thought of the last time he had seen his brother, and then deliberately blocked out the engulfing bitterness. That had been more than a year ago. Maybe Greg had changed since then. But somehow, Tom didn't think so.