1945: The first atomic bomb is tested successfully at the Alamogordo Bombing and Gunnery Range in a remote section of desert near Los Alamos, New Mexico. The instant the bomb detonated at 5:30 a.m. that Monday, the atomic age was born, and the world changed forever. The Trinity test, as it was known, was the culmination of the American effort to win the race against Germany (and, ultimately, the Soviet Union) in building an atomic ...