What influence did J. Robert Oppenheimer have on the development of nuclear technology?

As director of the atomic-energy research project at Los Alamos, N.Mex., from 1942 to 1945, Oppenheimer made important contributions to the development of atomic energy for military purposes. After the atomic bomb was used against Japan, Oppenheimer became one of the foremost proponents of civilian and international control of atomic energy; he was chairman of the general advisory committee of the U.S. Atomic Energy Commission from 1946 to 1952 and consultant to the American delegate to the UN Atomic Energy Committee. He strongly opposed the development of the hydrogen bomb in 1949 on both technical and moral grounds.  more