<human>:  I have a question about the history of Nuclear disarmament. When did the first nuclear weapons test take place?
<bot>: The first nuclear weapons test took place in New Mexico in July 1945. The United States tested the first nuclear weapon, called the Trinity test, on July 16, 1945. The Trinity test was a nuclear weapon that was detonated by the United States in the New Mexico desert. The test was a success, and the United States was able to demonstrate the power of nuclear weapons.