The “Trinity” test, as it was secretly known, was the first nuclear detonation by the American military, occurring on July 16, 1945. That test resulted in the distribution of radioactive ...

Scientists have been building nuclear weapons for more than 80 years, but crafting this technology remains a challenge.

After the Trinity test, she joined several of the top Manhattan Project scientists in signing a petition that urged the military to demonstrate the bomb’s destructive capability rather than drop ...

The Manhattan Project National Historical Park ... Within a month of the Trinity test, two bombs -- Little Boy and Fat Man -- were dropped on the two cities in Japan, killing tens of thousands ...