joining us is joe cirincione. thank you for being here. >> my pleasure, rachel. thank you for having me. >> you are an acute observer of processes, diplomatic and otherwise, around the world regarding nuclear proliferation and nuclear weapons. what did the obama administration do that the bush administration and their predecessors weren't able to do in order to get this deal? >> well, as you pointed out, when the president came into office, he had a mess on his hands. people were comparing the legacy that he inherited to the legacy that abraham lincoln had to deal with or franklin delano roosevelt had to deal with, and it didn't make it any easier to fix those problems when you had your political opponents fighting you every day, every step of the way and you had some of your allies and friends looking aside and not helping you. but he was determined. and remember, in his inaugural speech, his very first day in office, to extend the hand of friendship to iran, to break with the bush administration approach that thought you could change the regime, overthrow it, c