What's more, both America and Russia are sitting on a wealth of nuclear fuel. Current nuke numbers are still staggering, considering the vast damage that just a handful of thermonuclear warheads can do: The U.S. maintains a stockpile of 2,200 nuclear warheads, the Russians 2,800. Talks between Presidents Obama and Medvedev this summer limited deployed warheads to 1,500, which opens up quite a few nukes for decommissioning if the two parties so choose. However, it's unclear that they will. The Strategic Arms Reduction Treaty expires Dec. 5 and a new agreement to cut arms further could be reached, but even that doesn't guarantee that bomb cores will be dismantled and converted to peaceful use, as the talks deal strictly with delivery vehicles and deployed active nukes.