On Digg there's this cool link to a collection of photographs of nuclear tests conducted by the United States which were detonated both on land and sea between July 1945 and November 1962. The collection is entitled "100 SUNS" and these breathtaking pictures were put together by Michael Light.
From the photographer's website:
100 SUNS documents the era of visible nuclear testing, the atmospheric era, with 100 photographs drawn by Michael Light from the archives at Los Alamos National Laboratory and the U.S. National Archives in Maryland. It includes previously classified material from the clandestine Lookout Mountain Air Force Station based in Hollywood, whose film directors, cameramen, and still photographers were sworn to secrecy.