c-span and c-span3, and also on c-span radio and c-span.org. >> next, iran's nuclear program, the brookings institution hosted a talk ahead of meetings between iran and the u.n.'s p-5 plus one group meeting this week in kazakhstan. among the speakers, president obama as coordinator for wmds. this is about app hour and a half. >> well thank you very much for inviting me to participate in the debate. i was in charge of the negotiation for a long period of time, and in 2009 from 2003 when i was the first -- the first visit to teheran, we said the plan at the time, the plan of the european union so from 2010 to today, i have been less in charge, but i follow closely, and i'm on the lines of communication. i don't have any responsibility from thereon. let me start a little reminder how these started because i think it's very important to have perspective of how the whole process has gone. what, to my mind, has been the most important moment in which iran may have taken place? why was it happen? the last moment i will say how i see the next step to my mind could be taken in order to approach the change, and with all the difficulties, all the difficult -- many difficulties that we have