On January 23, 1961, the US Air Force accidentally dropped two Mark 39 hydrogen bombs over Goldsboro, North Carolina.
The bombs fell to earth after they became separated from a B-52 bomber, which went into a tailspin in mid-air, The Guardian reported based on a secret document obtained by investigative journalist Eric Schlosser under the Freedom of Information Act.
One of the bombs, which was designed to be used in warfare, acted exactly as a nuclear weapon when its parachute opened and its trigger mechanisms engaged. However, one low-voltage switch, which failed to flip, prevented millions of Americans from being killed .... http://www.presstv.ir