The first atomic bomb exploded on July 16, 1945, during a test known as the Trinity Test, conducted in the New Mexico desert as part of the Manhattan Project. This significant event marked the first demonstration of nuclear weapons technology, developed in secrecy during World War II. The successful detonation of the bomb led to the development of larger bombs, including those dropped on Hiroshima and Nagasaki, which ultimately contributed to the end of the war in the Pacific. The Trinity Test also ushered in the nuclear age, raising profound ethical questions about warfare and the implications of atomic energy for humanity.