In a statement, Rob Wallace, of the WWII Museum's education team, said that Johnston "was the only person to see all three atomic detonations in 1945. Johnston reflected on his role in ushering in the "Atomic Age" in an oral history for the National World War II museum in New Orleans before he died at age 93 in 2011 at his home in Moscow, Idaho. "So many people were being killed every day, so many Japanese being killed every day by the bombers" with conventional weapons, he said. … I was praying that God would help us bring an end to the war."
Johnston said he knew that, "All those people that were going to be killed - I was praying for them. The final death toll from the Hiroshima bombing may never be known, but estimates say at least 80,000 were killed in the initial shock waves and firestorm, some vaporized and leaving only silhouettes to their existence on walls. He was well aware of the immense destructive power and carnage that the bomb would inflict on the city after witnessing the Trinity test but - like most of the scientists at Los Alamos who created the weapon - saw its use as the horrific means to achieve the final end to a war that was causing far more killing. 6, 1945, his first reaction on seeing the blinding flash and the mushroom cloud was: "Praise the Lord, my detonators worked." When the bomb dropped on Hiroshima, Japan, on Aug.