>> if you're changing behaveior, sometimes that's a good thing. we've had loan wolves assassinate presidents lincoln, garfield, mckinley, you took the secret service, working on counterfeit and put them in protecting the president. look there's a huge cost to that. but the cost of losing a president is even more. the cost of going through a tsa line creating tsa nightmare that we fly through every single week it's a prevention measure that is necessary. and sometimes those behaviors have to change. we have to arm our military that can carry guns in iraq, think they can carry guns here. things change for prevention for the better. >> good point. thoughts and prayers go to the victims and their families. >> absolutely. >>> cavuto on business. charles is in for neil. charles, what do you got? >> a good education, classmates liked him so what made the 24-year-old do something like this? plus hillary clinton says workers should get a piece of their company's profits but would that put more americans out of work? see you at the bottom of the hour. >> we

. >> nic, one of the issues we've seen one of the sticking points has to do with iran's past behaveior and whether it tried to seek nuclear weapons capability. we're learning from a u.n. investigation that they believe that was the case and yet iran is maintaining, no that's not what we did. our nuclear program has been just for energy. so how does that complicate matters here? >> reporter: hugely. and i don't think that issue has been probably resolved. possible military dimensions how much of the nuclear technology did iran use to try to develop nuclear weapons? there are substantially 12 issues on the pmd account. iran was beginning to answer those a few years back. they answered one of them. there are 11 really outstanding. the iaea chief went to tehran last week to talk about this but it was very clear from this statement when he came back that he might have made some progress on it but he said it would take to the end of the year and goodwill on the iranian side to begin to go further to answering all those questions. so i think that has been a key stumbling block, that may have

we had regard to the range of scenarios about what might have led to the observed behaveior of the aircraft. we affected that into our search. comments on those sorts of speculative reports are for the malaysian authorities who are leading the investigation. >> i'm sure they are getting those questions tonight. you said that you hope to know in the next 24 or 48 hours whether this piece of debris that we have been looking at is in fact from mh370. are you closer to confirming this is from mh370? >> we have been getting closer. at this stage, we are highly confident. but there still needs confirmation that it is it a part from a 777 aircraft. the only 777 aircraft that we're aware of in the indian ocean that could have led to this floating is mh370. we still need to confirm that through closer study of what appears to be a flaperon or identification of part numbers and so on. >> is it more of just getting your hands on it getting eyes on it directly? is that not something that can be established through purely photographs at this point? >> we are certainly working with our french and malaysi