Julius Robert Oppenheimer (April 22, 1904 – February 18, 1967) was an American theoretical physicist and professor of physics at the University of California, Berkeley. As the wartime head of the Los Alamos Laboratory, Oppenheimer is among those who are called the "father of the atomic bomb" for their role in the Manhattan Project, the World War II project that developed the first nuclear weapons that ended the war with the atomic bombings of Hiroshima and Nagasaki. The first atomic bomb was detonated on July 16, 1945, in the Trinity test in New Mexico; Oppenheimer remarked later that it brought to mind words from the Bhagavad Gita: "Now I am become Death, the destroyer of worlds."