This Day in History: 1971-11-06

Cannikin nuclear test takes place this day in 1971 as the US detonates the largest underground nuclear weapon ever, at 400 times the size of Hiroshima. Concerned about possible earthquakes and tsunamis, a group forms in Vancouver Canada called the Dont Make a Wave committee, later known as Greenpeace. In 1996, researchers found that plutonium and americium radiation was leaking from the test site on Amchitka island, although this is disputed by the US government.