A brilliant theoretical physicist, J. Robert Oppenheimer was tapped to head up a laboratory in Los Alamos, New Mexico, as part of U.S. efforts to develop nuclear weapons. He succeeded—but would go on to advocate against developing even more powerful bombs.
Born in New York City in 1904, Oppenheimer studied theoretical physics at both Cambridge University and the University of Göttingen in Germany, where he gained his doctorate at age 23. Soon the young physicist "Oppie" rubbed shoulders with the greatest scientific figures of his age, and his academic work advanced quantum theory and predicted everything from the neutron to the black hole.
After the United States joined the Allies in 1941, Oppenheimer was asked to participate in the top-secret Manhattan Project, whose aim was to develop an atomic weapon.
On July 16, 1945, Oppenheimer and others gathered at the Trinity test site south of Los Alamos for the world's first attempted nuclear blast. Conducted in secret, the test worked. On August 6 and August 9, 1945, the U.S. dropped two of the bombs Oppenheimer had helped develop over Hiroshima and Nagasaki. On the night of the Hiroshima bombing, Oppenheimer was cheered by a crowd of fellow scientists at Los Alamos, and declared that his only regret was that the bomb hadn't been finished in time to use against Germany.
Twenty years after the attacks on both cities in Japan, Oppenheimer appeared in a 1965 NBC News documentary called The Decision to Drop the Bomb. "We knew the world would not be the same," he said onscreen. "A few people laughed; a few people cried. Most people were silent. I remembered the line from the Hindu scripture（印度梵经）, ‘Now I am become Death, the destroyer of worlds.' I suppose we all thought that, one way or another."
However, Oppenheimer opposed America's attempts to develop a more powerful hydrogen bomb. Did he really live to regret helping develop the atomic bomb? No one knows. He doesn't come into easy categories of pro-nuclear, anti-nuclear or anything like that. He's a complicated figure.
