Obama and nuclear disarmament

Hi folks,

This is a little "last week", but here's one (of many) little articles out there on the importance of Obama's anti-nuke agenda to why he received the Nobel Peace Prize:
Scientific American article on Obama's Peace Prize

I'm interested to look back over what Obama has done in the last year and to put together a better picture of what he has actually done on the issue of nuclear weapons. Would love to have your help in this - let me know what you find! In April, he gave a big foreign policy speech in Prague calling for the U.S. to lead the world in phasing out nuclear weapons. But I am not sure how much actual policy has changed since he took office.

Also, I found this interesting opinion piece from Slate.com that criticized that speech and called the very idea of U.S. nuclear disarmament laughable and pointless:
Slate.com critique of Obama's April Foreign Policy Speech