This Canadian-Japanese co-production uses both vintage historical footage (including armed forces films and period newsreels) and contemporary dramatic reenactments to tell the story of how the scientific and military minds behind the Manhattan Project, under the orders of President Harry Truman (Kenneth Welsh), developed the first atomic bomb. The weapon was first used to attack the city of Hiroshima near the end of World War II, changing forever the shape of modern warfare and bringing fearsome devastation to a previously quiet Japanese city. ~ Mark Deming, Rovi