July 16, 1945 - The very first atomic bomb was tested on this day in Almogordo, New Mexico. And so began the Atomic Age.
An implosion-design plutonium device nicknamed "the gadget" was used in the test. The resulting blast was the equivalent of 20 kilotons of TNT.
The concrete and steel of the testing tower was vaporized instantly and the floor of the desert was turned into a bowl of glass 10 feet thick and 1000 feet wide.