President Barack Obama made the auspicious step of releasing his new Nuclear Posture Review on Tuesday, two days before he was due to co-sign an arms reduction treaty with Russian President Dmitry Medvedev in Prague. So what, you may wonder, is the Nuclear Posture Review? The BBC has some details.
The Nuclear Posture Review, published on Tuesday, outlines plans for “achieving substantial further nuclear force reductions” beyond the new treaty.
Every president since 1991 conducts such a review - the last one took place in 2001 at the start of George W Bush’s administration.
But Mr Obama set high expectations when he declared America’s commitment to seek the peace and security of a world without nuclear weapons in Prague last year.
For the first time, the US is ruling out a nuclear response to attacks on America involving biological, chemical or conventional weapons.