The United States disclosed for the first time on Monday the current size of its nuclear arsenal, lifting the veil on once top-secret numbers in an effort to bolster non-proliferation efforts.

The Pentagon said it had a total of 5,113 warheads in its nuclear stockpile at the end of September, down 84 percent from a peak of 31,225 in 1967. The arsenal stood at 22,217 warheads when the Berlin Wall fell in 1989.

The figure includes warheads that are operationally deployed, kept in active reserve and held in inactive storage. But it does not include "several thousand" warheads that are now retired and awaiting dismantlement, the Pentagon said.

"The United States is showing that it is being increasingly transparent," a senior U.S. defense official told reporters at the Pentagon. "It's part of our commitment ... to set the stage for strength in non-proliferation and for further arms control."

The official declined to offer the Pentagon's estimate for Russia's arsenal and renewed calls for greater transparency by China, saying there was "little visibility" when it came to Beijing's nuclear program.

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TVNL Comment:  Will the US demand any transparency at all from Israel regarding its nuclear weapons program?  Just asking....