The turning point came in 1943, when two German generals who had been captured separately were brought to Britain for interrogation – and then allowed to talk alone together, not suspecting that the room was bugged. They debated why the rockets hadn't been used yet, saying that something must have gone wrong because they'd been told more than a year earlier that the weapons would be ready in only a few months. According to Jones, one of them said, "Well, we're somewhere near London, and we've heard no bang, so nothing could have happened."