He chuckled. This would be something new for Eugenio Galvez—for which he could be thankful.

"I hope the generators don't develop any last-second bugs," he said. "We'll only be a mile and a half away, and that'll be too close to fifty kilos of negamatter if the field collapses."

"It'll be all right," Pitov assured him. "The bugs have all been chased out years ago."

"Not out of those generators in the rocket. They're new." He fumbled in his coat pocket for his pipe and tobacco. "I never thought I'd run another nuclear-bomb test, as long as I lived."

"Lee!" Pitov was shocked. "You mustn't call it that. It isn't that, at all. It's purely a scientific experiment."

"Wasn't that all any of them were? We made lots of experiments like this, back before 1969." The memories of all those other tests, each ending in an Everest-high mushroom column, rose in his mind. And the end result—the United States and the Soviet Union blasted to rubble, a whole hemisphere pushed back into the Dark Ages, a quarter of a billion dead. Including a slim woman with graying blonde hair, and a little red dog, and a girl from Odessa whom Alexis Pitov had been going to marry. "Forgive me, Alexis. I just couldn't help remembering. I suppose it's this shot we're going to make, tonight. It's so much like the other ones, before—" He hesitated slightly. "Before the Auburn Bomb."

There; he'd come out and said it. In all the years they'd worked together at the Instituto Argentino de Ciencia Fisica, that had been unmentioned between them. The families of hanged cutthroats avoid mention of ropes and knives. He thumbed the old-fashioned American lighter and held it to his pipe. Across the veranda, in the darkness, he knew that Pitov was looking intently at him.

"You've been thinking about that, lately, haven't you?" the Russian asked, and then, timidly: "Was that what you were dreaming of?"

"Oh, no, thank heaven!"

"I think about it, too, always. I suppose—" He seemed relieved, now that it had been brought out into the open and could be discussed. "You saw it fall, didn't you?"