Robert Oppenheimer ... After the war, Oppenheimer chaired the U.S. Atomic Energy Commission. He opposed developing an even more powerful hydrogen bomb. When President Truman finally approved ...

Robert Oppenheimer, widely known as the "father ... understand the difference in the values of former US President Harry Truman, who authorized dropping the atomic bombs, and those of his grandfather.

Robert Oppenheimer ... On the evening of August 14, President Harry S. Truman told reporters at the White House that Japan had surrendered. That was the last time nuclear weapons were used ...

Robert Oppenheimer ... After the war, Oppenheimer chaired the U.S. Atomic Energy Commission. He opposed developing an even more powerful hydrogen bomb. When President Truman finally approved ...