US reveals size of nuclear arsenal

The United States has 5,113 nuclear warheads in its stockpile and "several thousand" more retired warheads awaiting the junk pile, the Pentagon said in an unprecedented accounting of a secretive arsenal born in the Cold War and now shrinking rapidly.

The Obama administration disclosed the size of its atomic stockpile going back to 1962 as part of a campaign to get other nuclear nations to be more forthcoming, and to improve its bargaining position against the prospect of a nuclear Iran.