<P> The nuclear weapons tests of the United States were performed between 1945 and 1992 as part of the nuclear arms race . The United States conducted around 1,054 nuclear tests by official count , including 216 atmospheric , underwater , and space tests . Most of the tests took place at the Nevada Test Site ( NNSS / NTS ) and the Pacific Proving Grounds in the Marshall Islands and off Kiritimati Island in the Pacific , plus three in the Atlantic Ocean . Ten other tests took place at various locations in the United States , including Alaska , Nevada other than the NNSS / NTS , Colorado , Mississippi , and New Mexico . </P>
<P> The nuclear weapons tests of the United States were performed between 1945 and 1992 as part of the nuclear arms race . The United States conducted around 1,054 nuclear tests by official count , including 216 atmospheric , underwater , and space tests . Most of the tests took place at the Nevada Test Site ( NNSS / NTS ) and the Pacific Proving Grounds in the Marshall Islands and off Kiritimati Island in the Pacific , plus three in the Atlantic Ocean . Ten other tests took place at various locations in the United States , including Alaska , Nevada other than the NNSS / NTS , Colorado , Mississippi , and New Mexico . </P>
where have nuclear explosions occurred the most in the us
where have nuclear explosions occurred the most in the us
the Nevada Test Site
the Nevada Test Site