![Trinity nuclear test](http://upload.wikimedia.org/wikipedia/commons/thumb/7/78/Trinity_Test_Fireball_16ms.jpg/425px-Trinity_Test_Fireball_16ms.jpg)
The Trinity nuclear test explosion, .016 seconds after detonation. The fireball is about 200 metres (700 ft) wide. Conducted by the United States on July 16, 1945, at a location 35 miles (56 km) southeast of Socorro, New Mexico, on what is now White Sands Missile Range, Trinity was the first test of technology for a nuclear weapon.