 So he said along around 8.30 or so, they heard the aircraft coming in, and that's when the warning happened. So they climbed into the trenches, and they got into the position they were told to get into. He said he was crouched down, he had his head down, his eyes closed. And even with this, all of a sudden he said there was light. He seriously felt that he had actually seen the blast of the bomb. Now, what he had witnessed here was the detonation of a 19 kiloton bomb.