FILE - In this May 20, 1956, file photo provided by the Atomic Energy Council, the sky near Bikini Atoll in the Pacific is a study in black and white as the fireball from the airplane dropped H-bomb silhouette clouds in the foreground at dawn. The world is wondering if North Korea's next nuclear test will involve a nuclear missile screaming over Japan after the North said it may test a hydrogen bomb in the Pacific Ocean. (AP Photo/Atomic Energy Council, File)
{}