<P> The nuclear powers have conducted more than 2,000 nuclear test explosions (numbers are approximate, as some test results have been disputed): </P> <Ul> <Li> United States: 1,054 tests by official count (involving at least 1,149 devices). 219 were atmospheric tests as defined by the CTBT . These tests include 904 at the Nevada Test Site, 106 at the Pacific Proving Grounds and other locations in the Pacific, 3 in the South Atlantic Ocean, and 17 other tests taking place in Amchitka Alaska, Colorado, Mississippi, New Mexico and Nevada outside the NNSS (see Nuclear weapons and the United States for details). 24 tests are classified as British tests held at the NTS . There were 35 Plowshare detonations and 7 Vela Uniform tests; 88 tests were safety experiments and 4 were transportation / storage tests . Link to United States' table data . Motion pictures were made of the explosions, later used to validate computer simulation predictions of explosions . </Li> <Li> Soviet Union: 715 tests (involving 969 devices) by official count, plus 13 unnumbered test failures . Most were at their Southern Test Area at Semipalatinsk Test Site and the Northern Test Area at Novaya Zemlya . Others include rocket tests and peaceful - use explosions at various sites in Russia, Kazakhstan, Turkmenistan, Uzbekistan and Ukraine . Link to Soviet Union's table data </Li> <Li> United Kingdom: 45 tests (21 in Australian territory, including three at the Montebello Islands, nine in mainland South Australia at Maralinga and Emu Field, some at Christmas Island (Kiritimati) in the Pacific Ocean, plus 24 in the United States at the Nevada Test Site as part of joint test series) 43 safety tests (the Vixen series) are not included in that number, though safety experiments by other countries are . Link to the United Kingdom's summary table </Li> <Li> France: 210 tests by official count (50 atmospheric, 160 underground), four atomic atmospheric tests at C.E.S.M. near Reggane, 13 atomic underground tests at C.E.M.O. near In Ekker in the French Algerian Sahara, and nuclear atmospheric and underground tests at and around Fangataufa and Moruroa Atolls in French Polynesia . Four of the In Ekker tests are counted as peaceful use, as they were reported as part of the CET's APEX (Application pacifique des expérimentations nucléaires), and given alternate names . Link to France's summary table </Li> <Li> China: 45 tests (23 atmospheric and 22 underground), at Lop Nur Nuclear Weapons Test Base, in Malan, Xinjiang There are two additional unnumbered failed tests . Link to China's summary table </Li> <Li> India: Six underground explosions (including the first one in 1974), at Pokhran . Link to India's summary table </Li> <Li> Pakistan: Six underground explosions at Ras Koh Hills and the Chagai District . Link to Pakistan's summary table </Li> <Li> North Korea: Link to North Korea's summary table North Korea is the only country in the world that still tests nuclear weapons, and their tests have caused escalating tensions between them and the United States . Their most recent nuclear test was on September 3, 2017 . </Li> </Ul> <Li> United States: 1,054 tests by official count (involving at least 1,149 devices). 219 were atmospheric tests as defined by the CTBT . These tests include 904 at the Nevada Test Site, 106 at the Pacific Proving Grounds and other locations in the Pacific, 3 in the South Atlantic Ocean, and 17 other tests taking place in Amchitka Alaska, Colorado, Mississippi, New Mexico and Nevada outside the NNSS (see Nuclear weapons and the United States for details). 24 tests are classified as British tests held at the NTS . There were 35 Plowshare detonations and 7 Vela Uniform tests; 88 tests were safety experiments and 4 were transportation / storage tests . Link to United States' table data . Motion pictures were made of the explosions, later used to validate computer simulation predictions of explosions . </Li> <Li> Soviet Union: 715 tests (involving 969 devices) by official count, plus 13 unnumbered test failures . Most were at their Southern Test Area at Semipalatinsk Test Site and the Northern Test Area at Novaya Zemlya . Others include rocket tests and peaceful - use explosions at various sites in Russia, Kazakhstan, Turkmenistan, Uzbekistan and Ukraine . Link to Soviet Union's table data </Li>

Where was the atomic bomb tested in the us
find me the text answering this question