Fan Su was curled in her sleeping bag, watching as Nick studied the mosiac maps with a flashlight. By now he knew them by heart. He saw, with pleasure, that the old General had known what he was talking about. They valley they were now in was roughly parallel to the narrow entrance of the Chumbi. A half-mile inside the Chumbi entrance, according to the satellite pictures, a gallery ran from an open cut into the solid rock of the west facade. It was in that gallery that the monkey business was going on. Here the ChiComs were building what the CIA chose to call Prop B - the biggest hydrogen bomb in the world.

1967.