"During the entire last war," he said, shaking his head. "They outfitted even the oldest craft with it, right after the second one. The Little Doctor would start a chain reaction: one atom would explode, and take the one next to it with it, and then the next, and so on. Pretty useful when your enemies liked to clump together."

He was starting to realise he was trying to help Ben as much as he could, with all of his little feigned weaknesses. Putting a name to it made it easier.