Nuclear Tests and LocationsFrom 1945 until 1998, there have been over 2,000 nuclear tests conducted worldwide.
United StatesFirst nuclear test: 1945
Most recent nuclear test: 1992
Total tests: 1,030 (815 underground)
Test sites: (Nevada Test Site) Nevada, Alaska, New Mexico, Mississippi, Colorado, USA; Johnston Atoll, part of the US Minor Outlying Islands; Malden Island, Kiribati; Christmas Island, Australia; Bikini Atoll, Marshall Islands
The United States has conducted more tests than the rest of the world, and was the first and only country to use a nuclear weapon in wartime. The U.S. has signed the Comprehensive Test Ban Treaty, but it has not yet been ratified by the Senate.
RussiaFirst nuclear test: 1949
Most recent nuclear test: 1990
Total tests: 715 (496 underground)
Test sites: (Semipalatinsk Test Site) Kazakhstan, (Northern Test Site) Novaya Zemlya, Ukraine, Uzbekistan, Turkmenistan
Russia was the second nation in the world to conduct nuclear tests.
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