It's been just about 80 years since President Truman told the nation, August 6, 1945... (SOUNDBITE OF ARCHIVED RECORDING) HARRY S TRUMAN: A short time ago, an American airplane dropped one bomb on ...

The U.S. altered the course of history 80 years ago when it dropped the atomic bomb on Japan. It was an audacious move that ultimately led to the end of World War II. The motivation and secrecy ...

After three decades of uneasy slumber since the end of the Cold War, atomic weapons are back in the headlines. There were Vladimir Putin’s threats to use them in Ukraine or send them up into space.