On April 1, 2017, the White Sands Missile Range in New Mexico opened its Stallion gate to the public, like it does twice every year. For a few hours, visitors are free to wander the Trinity Test Site, ...

J. Robert Oppenheimer led the scientific effort that created the world’s first atomic bomb during World War II. The Trinity test in 1945 produced an explosion equal to nearly 25,000 tons of TNT, ...

In October 1964, the People’s Republic of China detonated its first atomic bomb under the code name Project 596 at the Lop Nur test site. Developed after the collapse of Soviet assistance, the program ...

Editor’s note: The Bulletin of the Atomic Scientists presents here, from its September 1946 issue, an eyewitness account of the first atomic bomb test in the Marshall Islands. In it, the author not ...