It began in the desert of New Mexico on July 16, 1945, with the first U.S. atomic test called Trinity. The device was comprised of 19,300 tons of TNT explosive. There was an intense light that brightened the distant mountains, a sudden wave of heat, and then a tremendous roar as the shock wave echoed in the valley (Bolt 1). This was the first atomic test recorded in the history of the world. The man who invented the atomic bomb was physicist Albert Einstein. Two months after Einstein's incredible invention, the United States dropped two atomic bombs on Japan. One bomb was nicknamed Little Boy, which killed 70,000 people, including soldiers