On August 6, 1945, the city of Hiroshima was the target of the first atomic bomb used against civil population in history. Three days later, the United States dropped a second atomic bomb over the city of Nagasaki. In total, about a quarter of a million people were killed by the two bombs.

Today, Hiroshima, Nagasaki, and the country of Japan are strongly engaged in banning nuclear weapons and their testing worldwide.