On August 6, 1945, a revolutionary new weapon destroyed Hiroshima, a Japanese city of 300,000 inhabitants. Three days later, a second atomic bomb was dropped on Nagasaki. America’s secret super-weapon was lauded for bringing about victory in the Pacific and ending World War II. President Truman’s official announcement included half-truths that shaped the government’s official narrative: “Sixteen hours ago, an American airplane dropped one bomb on Hiroshima, an important Japanese army base.” In f