Atomic Bomb

A nuclear bomb and its parachute rest in a field near Goldsboro, N.C. after falling from a B-52 bomber in 1961.
U.S. Air Force

During the Cold War, U.S. planes accidentally dropped nuclear bombs on the east coast, in Europe, and elsewhere. "Dumb luck" prevented a historic catastrophe. 

Image of atomic wasteland in Nagasaki
Hayashi Shigeo, Courtesy of Nagasaki Atomic Bomb Museum

In 1945, the United States dropped two atomic bombs in Japan, killing more than 200,000 individuals within a year.