It was seventy years ago today that the New Mexico desert was first lit in the glare of a nuclear explosion. Dubbed “Trinity” by the scientists who had built it, the 1945 test was the first time an atomic bomb had ever been detonated. A little over a month later, similar devices would be dropped on the Japanese cities of Nagasaki and Hiroshima, ending WWII in the Pacific and killing as many as 200,000 people. Three explosions in three different locations, they were the first of many, with results that sparked fears of nuclear warfare that remain today. And now, seventy years later, photos depicting the tests pay homage to the dark anniversary.