A few weeks after the publication of UNSA's interim conclusions, the Navcomms scientists on Ganymede held a celebration dinner in the officers' mess at Pithead to mark the successful end of a major part of their task. The evening had reached the warm and mellow phase that comes with cigars and liqueurs when the last-course dishes have been cleared away. Talkative groups were standing and sitting in a variety of attitudes around the tables and by the bar, and beers, brandies, and vintage ports were beginning to flow freely. Hunt was with a group of physicists near the bar, discussing the latest news on the Ganymean field drive, while behind them another circle was debating the likelihood of a world government being established within twenty years. Danchekker seemed to have been unduly quiet and withdrawn for most of the evening.

"When you think about it, Vic, this could develop into the ultimate weapon in interplanetary warfare," one of the physicists was saying. "Based on the same principles as the ship's drive, but a lot more powerful and producing a far more intense and localized effect. It would generate a black hole that would persist, even after the generator that made it had fallen into it. Just think—an artificially produced black hole. All you'd have to do is mount the device in a suitable missile and fire it at any planet you took a dislike to. It would fall to the center and consume the whole planet—and there'd be no way to stop it."

Hunt looked intrigued. "You mean it could work?"

"The theory says so."

"Christ, how long would it take—to wipe out a planet?"

"We don't know yet; we're still working on that bit. But there's more to it than that. There's no reason why you shouldn't be able to put out a star using the same method. Think about that as a weapon—one black-hole bomb could destroy a whole solar system. It makes nucleonic weapons look like kiddie toys."

Hunt started to reply, but a voice from the center of the room cut him off, rising to make itself heard above the buzz of conversation. It belonged to the commander of Pithead Base, special guest at the dinner.