sophisticated bunker busting bombs, if this was some kind of an explosion, maybe an act of sabotage it shows a vulnerability that the iranians obviously hadn't counted on. >> that's absolutely true. it also shows that there are options short of a traditional act of war and relying only on negotiations that might make a meaningful difference. but there are also risks in what we don't know in this situation. jon: yeah, the iranians were supposed to sit down with the united states and some other nations for some nuclear talks, can't even agree on a location for the talks. it is thought that it might somehow handicap them if news of this thing gets out, and that's why they don't want to talk about it? what can you tell us about that? >> well, frankly, to me it's an interesting theory, in terms of what would make talks effective with iran. my own sense is that when a nation like iran, north korea handsome others --