he is a professor at m.i.t., taught there four years, led the department of phissics, served in the clinton administration as under secretary of energy and in the white house office of science and technology policy. for all those reasons and more, i am pleased to have him here at this table for the first time. welcome. >> pleased to be here. >> rose: there's much to talk about. clearly, we'll talk about energy in a broader sense and what you'd think of where we are in terms of climate and other issues, but let me begin with the nuclear talks. you have become famous to all of us sitting next to john kerry and the interesting fact is often sitting next to foreign minister zarif who was at this table a week or so ago is someone you knew at m.i.t. when you both were students. >> actually, we overlapped at m.i.t. but did not actually know each other then. we did meet subsequently in vienna when he was heading the i.a.e.a. delegation for iran but i can assure you we did not know each other as students. i can assure you we did not have the substantive discussions we had for 30 or 40 hours one on o