Nuclear weapons debate
After the bombings of Hiroshima and Nagasaki, the world’s nuclear weapons stockpiles grew, and nuclear weapons have been detonated on over two thousand occasions for testing and demonstration purposes. Countries known to have detonated nuclear weapons—and that acknowledge possessing such weapons—are (chronologically): the United States, the Soviet Union (succeeded as a nuclear power by Russia), the United Kingdom, France, the People's Republic of China, India, Pakistan, and North Korea.
U.S. nuclear weapons in Japan
In December 2015 the United States Government acknowledged officially for the first time that it had stored nuclear weapons in Okinawa prior to 1972. That U.S. nuclear weapons had been located in Okinawa had long been an open secret. The fact had been widely understood or strongly speculated since the 1960s and was subsequently revealed by the U.S. military in apparently unnoticed photographs of nuclear weapons and delivery systems on Okinawa that were declassified and released to the U.S. National Archives in 1990.