This was Trinity — the world’s first nuclear explosion, marking the moment humankind crossed into the atomic age.Part of The Manhattan Project led by J Robert Oppenheimer, Trinity was a codename ...

To determine the most powerful nuclear explosion in history, 24/7 Wall St. consulted various sources, including The Natural Resources Defense Council, atomicarchive.com, and Wikipedia.

A 9-megaton nuclear warhead sat on the edge of disaster, threatening an explosion that could have changed history forever. How did the U.S. narrowly avoid nuclear catastrophe?