The recent Oppenheimer film has prompted interest in the events surrounding the building and dropping of the atomic bombs. This Flashback Friday episode addresses whether there was an actual decision to use atomic bombs in World War II. If not, what were the questions and issues about using the bomb? Why did the US choose Hiroshima and Nagasaki as targets? Did Truman do it to scare the Soviets? Did dropping the bomb actually save lives compared with how many would have died during an invasion of Japan? Professor Philip Nash enlightens us.