WORLD HISTORY

Detailed explanation-1: -Atomic bombs have been used only twice in war-both times by the United States against Japan at the end of World War II, in Hiroshima and Nagasaki.

Detailed explanation-2: -A weapon of mass destruction is a nuclear, radiological, chemical, biological, or other device that is intended to harm a large number of people.

Detailed explanation-3: -During the final stages of World War II in 1945, the United States conducted atomic raids on the Japanese cities of Hiroshima and Nagasaki, the first on August 6, 1945, and the second on August 9, 1945. These two events were the only times nuclear weapons have been used in combat.