posts on the prison perimeter, a pilot and two bombardiers in each 'copter, stone-faced, staring grimly alert at the prison below. They were ready for the breakout. But there wasn't any breakout. The rockets went home for fuel. The jets went home for fuel. The helicopters hung on—still ready, still waiting. The rockets came back and roared harmlessly about, and went away again. They stayed away. The helicopter men never faltered and never relaxed. The prison below them was washed with light—from the guard posts on the walls, from the cell blocks themselves, from the mobile lights of the guard squadrons surrounding the walls. North of the prison, on the long, flat, damp developments of reclaimed land, the matchbox row houses of the clerical neighborhoods showed lights in every window as the figgers stood ready to repel invasion from their undesired neighbors to the east, the wipes. In the crowded tenements of the laborers' quarters, the wipes shouted from window to window; and there were crowds in the bright streets. "The whole bloody thing's going to blow up!" a helicopter bombardier yelled bitterly to his pilot, above the flutter and roar of the whirling blades. "Look at the mobs in Greaserville! The first breakout from the Jug's going to start a fight like you never saw and we'll be right in the middle of it!" He was partly right. He would be right in the middle of it—for every man, woman and child in the city-state would be right in the middle of it. There was no place anywhere that would be spared. No mixing. That was the prescription that kept the city-state alive. There's no harm in a family fight—and aren't all mechanics a family, aren't all laborers a clan, aren't all clerks and office workers related by closer ties than blood or skin? But the declassed cons of the Jug were the dregs of every class; and once they spread, the neat compartmentation of society was pierced. The breakout would mean riot on a bigger scale than any prison had ever known. But he was also partly wrong. Because the breakout wasn't seeming to come. The Jug itself was coming to a boil. Honor Block A, relaxed and easy at the end of another day, found itself shaken alert by strange goings-on. First there was the whir and roar of the Air Force