Watch how the first atomic bomb test unfolded, as scientists pushed the limits of physics in a race to end the war. Behind the scenes, there were real fears that the explosion could trigger a chain ...

Add Yahoo as a preferred source to see more of our stories on Google. FILE - This is a 1960 photo of a U.S. nuclear weapon of the uranium bomb Little Boy type that was detonated over Hiroshima in ...

Sometimes inventions save countless lives. Sometimes they end just as many. Sometimes, they do both. The United States dropped the first atomic bomb ever used in warfare on Aug. 6, 1945. The ...