mr. kimball, as you said, iran has been in violation of the npt for the better part of a decade. why should we agree that if they did not hold onto their obligations under npt that they will hold their obligations under this new report. i do not know if i should be concerned about this, but i heard iran's neighbors, if this deal goes through, they will develop their own weapons. so why shouldn't americans and people around the world be concerned this is the beginning of the end of the npt? guest: what is important about this agreement if it helps preserve the integrity of the nuclear nonproliferation system. the integrity of the safeguards system. what you run data over a decade ago was they pursued uranium enrichment technology from pakistan. they began secretly building a uranium enrichment facility. today, that facility has 20,000 centrifuge machines, about as tall as our room here. they spin very fast, enrich uranium. if you enrich uranium enough, you can have nuclear bomb material over time. what iran did was they did not inform the iaea about their plans. that is why we thi