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SECRETARY-GENERAL’S MESSAGE ON THE INTERNATIONAL DAY AGAINST NUCLEAR TESTS

New York, 29 August 2021

Today marks the 30th anniversary of the closure of Semipalatinsk nuclear test site in Kazakhstan, the largest nuclear test site in the Soviet Union.  The closure of that site, where more than 450 nuclear tests took place, signaled the end of the era of unrestrained nuclear testing.  Soon afterwards, countries started negotiating the Comprehensive Nuclear-Test-Ban Treaty, the...