Hiroshima bomb: Japan marks 75 years since nuclear attack
Bells have tolled in Hiroshima, Japan, to mark the 75th anniversary of the dropping of the world's first atomic bomb
Environmental divers clean up the HMS Perseus to protect marine life (Before & After Photos)
Six volunteer technical divers from the Ghost Diving organization dived to remove the fishing gear that was covering the submarine
Scientists describe setting off the world’s first nuclear bomb 75 years ago
No one "even raised the possibility that what we were doing might be morally wrong"
