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Also known as Complex 33, the White Sands V-2 Launching Site was developed to accommodate V-2 rocket tests. On the White Sands Missile Range the world's first nuclear device (code name "Trinity") was detonated on July 16, 1945. The Los Alamos Project of the Manhattan Engineer District of the War Department began in 1943 with its purpose the development and final manufacture of a nuclear instrument of war. The Trinity Site, within the White Sands Missile Range, is a National Historic Landmark.