J. Robert Oppenheimer (1904-1967) was the American theoretical physicist who directed the Manhattan Project at Los Alamos where the first nuclear weapons were developed. At the end of World War II the terrible destructive power of the atomic bombs “little boy” and “fat man” were unleashed on Hiroshima and Nagasaki respectively.

 

The mushroom cloud after the atomic bomb was dropped on Nagasaki in 1945.