The last four bombs from the third B-2 tracked in on the hydroelectric dam at the head of the valley. They were programmed to strike from bottom to top in the reinforced-concrete face of the structure, the timing and placement of the target points no less crucial than those of the weapons that had tracked in on the missile silos. Unseen and unheard by anyone, they came down in a line, barely a hundred feet separating one from another.

The dam was a hundred thirty meters high and almost exactly that thick at its base, the structure narrowing as it rose to a spillway width of only ten meters. Strong, both to withstand the weight of the reservoir it held back and also to withstand the earthquakes that plague Japan, it had generated electricity for more than thirty years.

The first bomb hit seventy meters below the spillway. A heavy weapon with a thick case of hardened steel, it burrowed fifteen meters into the structure before exploding, first ripping a miniature cavern in the concrete, the shock of the event rippling through the immense wall as the second weapon struck, about five meters over the first.

A watchman was there, awakened from a nap by the noise from down-valley, but he'd missed the light show and was wondering what it had been when he saw the first muted flash that seemed to come from inside his dam. He heard the second weapon hit. then the delay of a second or so before the shock almost lifted him off his feet.

"Jesus, did we get them all?" Ryan asked. Contrary to popular belief, and contrary now to his own fervent wishes, the National Reconnaissance Office had never extended real-time capability to the White House. He had to depend on someone else, watching a television in a room at the Pentagon.

"Not sure, sir. They were all close hits—well, I mean, some were, but some of the bombs appeared too premature—"

"What does that mean?"

"They seem to have exploded in midair—three of them, that is, all from the last bomber. We're trying to isolate in on the individual silos now and—"

"Are there any left intact, damn it'.'" Ryan demanded. Had the gamble failed?

"One. Maybe two. we're not sure. Stand by, okay?" the analyst asked rather plaintively. "We have another bird overhead in a few minutes."