<Li> Shot Frigate Bird of Operation Dominic I on 6 May 1962, was the only U.S. test of an operational submarine - launched ballistic missile (SLBM) with a live nuclear warhead (yield of 600 kilotons), at Christmas Island . In general, missile systems were tested without live warheads and warheads were tested separately for safety concerns . In the early 1960s, however, there mounted technical questions about how the systems would behave under combat conditions (when they were "mated", in military parlance), and this test was meant to dispel these concerns . However, the warhead had to be somewhat modified before its use, and the missile was a SLBM (and not an ICBM), so by itself it did not satisfy all concerns . </Li> <Li> Shot Sedan of Operation Storax on 6 July 1962 (yield of 104 kilotons), was an attempt to show the feasibility of using nuclear weapons for "civilian" and "peaceful" purposes as part of Operation Plowshare . In this instance, a 1,280 - foot (390 m) diameter 320 - foot (98 m) deep crater was created at the Nevada Test Site . </Li> <P> A summary table of each of the American operational series may be found at United States' nuclear test series . </P> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2013) (Learn how and when to remove this template message) </Td> </Tr> </Table>

Where are the nuclear weapons stored in the us