international security, to senator richard lugar, united nations security council's ban ki moon and murray snyder. we're engaged in research on the topic as "going nuclear and international security in the 21st century" coed itted by michael brown reflects. we're developing new course offerings in this area including a new graduate course this fall offered by professor of chemistry and international affairs christopher cahill on nuclear materials science funded by a grant from the nuclear regulatory commission. so it's a great pleasure to convene this discussion today to have all of you here together. and to have the opportunity to introduce the doctor to discuss the situation in iran which is obviously a -- the pressing issue that intrudes discussion of nuclear fuel cycle choices into the lives of many people around the world. he's currently with the science for international affairs at the john f. kennedy school at harvard university. he's spent 27 years prior to joining harvard with the international atomic energy agency in vienna, and the last five of those as deputy director general and head