North Korea agreed in principle in 2005 to scrap its nuclear program, including a presumed arsenal of several nuclear weapons, in exchange for energy aid and diplomatic benefits.

VOA: standard.2009.04.14

Over the past few years, Obama's top nuclear nonproliferation adviser, Joe Cirincione, has repeatedly advocated placing Israel's nuclear arsenal on the negotiating table and offering it up in exchange for an Iranian pledge to end its nuclear program.

CENTERFORSECURITYPOLICY: The perils ahead

In exchange, Moscow is expected to consider joining Washington in cutting back on its nuclear arsenal just as the likes of Iran and North Korea build up theirs.

CENTERFORSECURITYPOLICY: Avoiding an American ambush