A Very Scary Light Show: Exploding H-Bombs In Space

http://www.npr.org/templates/story/story.php?storyId=128170775&ft=1&f=1001

Back in 1962, the U.S. blew up a hydrogen bomb, creating what might be the greatest fireworks spectacular ever. People in Hawaii gathered on rooftops, sipping drinks, as they watched a radioactive rainbow display in the night sky.