Radioactive Materials Sign at Site of First Atomic Bomb - stock photo

Socorro, New Mexico, USA - April 2, 2016: Warning signs about radioactive materials were erected at what is now White Sands Missile Range following the detonation of the world's first atomic bomb in a remote area of south central New Mexico. The technology for a nuclear weapon was developed in extreme secrecy in what was known as the Manhattan Project. The test bomb, which was exploded July 16, 1945, proved that the concept would work and led to the dropping of two powerful atomic bombs on Japan -- helping to end World War II. Open houses are conducted free for the general public twice yearly at what is now known as the Trinity Site (ground zero), where photographs of various exhibits are permitted. The Trinity Site located about 35 miles southeast of of Socorro, New Mexico is a National Historic Landmark.