The explosion of the first atomic bomb at the Alamagordo Bombing Range, New Mexico, on July 16, 1945, was the start of a new era, the dawn of the atomic age. The preliminary work on atomic fission was done before the last world war, and as military leaders visioned its great destructive possibilities, several countries entered the race to be the first to harness atomic fission for military purposes. Our own country gambled two billion dollars, and with the aid of certain European scientists and in collaboration with England and Canada, succeeded in developing a fission chain reaction that made possible the atomic bomb.