#OTD 75 years ago, the first atomic bomb test at the Trinity site on what is now U.S. Army White Sands Missile Range, N.M., ushered the world into the atomic age. Since then, nuclear deterrence has served as the bedrock of U.S. national security. #Trinity75 #WWII | U.S. Department of War

On July 16, 1945, the scientists of the Manhattan Project conducted the Trinity Test; the first successful detonation of an atomic device. The device they detonated turned sand to glass, sent a mushroom cloud 38,000 feet into the stratosphere, and blew a 1.5-mile hole in the plains of the Alamogordo Bombing Range. Today marks the 78th anniversary of the Trinity Test. In this video–posted at the exact moment the test was initiated– filmmaker #ChristopherNolan and the cast and crew of the upcoming