At 5:30 a.m. mountain war time on July 16, 1945, the world’s first nuclear weapon detonated over a flat, arid stretch of New Mexico desert. The Trinity test, as it was code-named, confirmed that an ...

In 1971, the United States buried a massive thermonuclear device 6,000 feet beneath Amchitka Island and triggered the largest underground nuclear explosion in American history. The Cannikin blast was ...