U.S. Has 5,113 Nuclear Warheads

The United States has 5,113 nuclear warheads in its stockpile and "several thousand" more retired warheads awaiting the junkpile, the Pentagon said Monday 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.

"We think it is in our national security interest to be as transparent as we can be about the nuclear program of the United States," Secretary of State Hillary Rodham Clinton told reporters at the United Nations, where she addressed a conference on containing the spread of atomic weapons.