During the Cold War, the United States conducted atmospheric tests of nuclear weapons in the Marshall Islands of the Pacific. The total explosive yield of these tests was 108 megatons, equivalent to the detonation of one Hiroshima bomb per day over nineteen years. These tests, particularly Castle Bravo, the largest one, had tragic consequences, including the irradiation of innocent people and the permanent displacement of many native Marshallese. Keith M. Parsons and Robert Zaballa tell th...