On the 80th anniversaries of the Hiroshima and Nagasaki bombings, survivors continue searching for remains and healing—and Americans remain divided over whether the bombings were justified.

The atomic bombings of Hiroshima on August 6, 1945, and Nagasaki three days later brought a scale of destruction the world had never seen. Many who survived the blasts died in the weeks, months and years that followed.

Following are some facts about the bombing of the Japanese city of Hiroshima and a second attack on Nagasaki three days later -- the only times nuclear weapons have been used in war. Japan surrendered on Aug. 15, 1945, ending its role in World War Two.