This detailed chronology of the events and communication of 1945-1946 shows Truman's role in the process of the decision to drop the world's first atomic bomb used in warfare upon Hiroshima and then the second upon Nagasaki. Also...

Here is the story of the first ever atomic bomb, beginning with early scientific ideas, leading up to the success of this weapon.

Site explores the history of the first nuclear weapons and the challenges of maintaining these weapons today.