A year or so ago, they had a special on tv where they were interviewing the sole survivor of BOTH of the bombings. Yeah, the dude was in the city when the first one was dropped. Survived it, arrived in the next city later just when they dropped the big one on it too.
During the first bombing, he said he had Polaroid photos in his front shirt pocket and the blast actually transfered the images through the shirt to his skin.