President Truman was aboard the cruiser Augusta, returning from the Potsdam conference, when he was informed of the United States’ incineration of Hiroshima by the atomic bomb. Truman was exultant. He declared, “This is the greatest thing in history!” He went from person to person on the ship, officers and crew alike, telling them the great news like a town crier. Dorothy Day observed: “‘Jubilant’ the newspapers said. Jubilate Deo. We have killed 318,000 Japanese.”