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Manhattan Project scientists and officials convened on July 16, 1945 at 5:29:21 MT to witness the first atomic bomb test at the Trinity site. The explosion of the Gadget ushered in the atomic era. The Atomic Heritage Foundation is pleased to present a new series of videos of the Trinity test, courtesy of the Trinity […]

  Students imagine the scene at Trinity through a variety of creative writing assignments.   Materials: Video of the Trinity test and testimonies Other testimonies of witnesses of the Trinity Test on the "Voices of the Manhattan Project" oral history website The Manhattan Project anthology by Cynthia Kelly    Assignment: Students will assume the role of […]

On July 16, 1945, at 5:29 AM MT, Manhattan Project scientists conducted the world’s first atomic bomb test at the Trinity site near Alamogordo, New Mexico. The Atomic Heritage Foundation is pleased to feature dozens of audio/visual interviews with Trinity test eyewitnesses on the “Voices of the Manhattan Project” website. From Manhattan Project director General Leslie […]

July 16, 2015, was the 70th anniversary of the Trinity test, the world’s first nuclear test. Many media outlets around the country and the world covered the anniversary. Here is a roundup of some of the news articles commemorating the anniversary. The First Light of Trinity – Alex Wellerstein in The New Yorker Seven Decades […]

In the final episode of Season 2 of Manhattan, everyone converges on the Trinity site for the world’s first test of an atomic device. At the end of the ninth episode, Paul Crosley went to Frank with his suspicions that Jim Meeks was the Soviet spy on the Hill. Frank isn’t convinced until he tries […]

On July 16, 1945, at 5:29:21 MT, Manhattan Project scientists conducted the world’s first atomic bomb test at the Trinity site near Alamogordo, New Mexico. The purpose of the test was to confirm that an implosion assembly method device with a plutonium core would set off a nuclear chain reaction. The bomb, called the “Gadget,” […]

Nobel Prize-winning physicist Val Fitch recalled being awestruck by the world’s first nuclear test, the Trinity Test: “It’s hard to overstate the impact on the senses of something like that. First the flash of light, that enormous fireball, the mushroom cloud rising thousands of feet in the sky, and then, a long time afterwards, the sound. The […]

The Trinity Test, the world’s first nuclear test, took place on July 16, 1945, in Alamogordo, NM.

Edit 02/02/2022: These items are no longer available for purchase, and the AHF online store is no longer in opperation.   On October 1, the Trinity Site will be open for visitors for just the second time this year. In anticipation of the site being opened, AHF has printed T-shirts featuring the “Gadget” nuclear device […]

At 5:29:45 on July 16, 1945, “Gadget” exploded and the Atomic Age began.