Japan

Test Baker marked the first-ever underwater nuclear explosion when the 23 kiloton device was detonated on July 25, 1946.
Thinking About the Unthinkable

It was a terrible anniversary. Seventy years ago this past week, at zero eight fifteen hours, August 6th, 1945, the Enola Gay, a U.S. Army Air Force B-29, dropped an 8,900-pound bomb, dubbed “Little Boy”, over the Japanese city of Hiroshima. Three days later a second bomb, Fat Man, fell upon Nagasaki.