How many nuclear tests were conducted in the world before the CTBT opened for signature in 1996?

Between 1945 and 1996, more than 2,000 nuclear tests—over 1,000 by the United States, over 700 by the Soviet Union, 210 by France, 45 by the United Kingdom, and 45 by China—were conducted at over 60 test sites around the world.

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