Final answer:
The first nuclear explosion was set off at the New Mexico site with the religious name Trinity.
Step-by-step explanation:
The first nuclear explosion was set off at the New Mexico site with the religious name Trinity. On July 16, 1945, the U.S. conducted the Trinity Test in the isolated Alamogordo Desert, about 200 miles south of Los Alamos. This test marked the successful detonation of the first atomic bomb and was a significant milestone in the development of nuclear weapons.