J. Robert Oppenheimer, the physicist often credited as the father of the atomic bomb, was asked on the twentieth anniversary of the atomic bombing of Hiroshima whether it was necessary. He responded that the decision was made in good faith and on the best evidence available at the time. The upcoming movie "Oppenheimer" will explore his life and the moral dilemmas he faced, as his work on the atomic bomb helped end World War II, but also ushered in a new era of nuclear warfare.
