seth jones, a counterterror expert at the rand corporation, has analyzed the marathon attack and howwas pulled off. >> ad libbed part of it and made some decisions on a few elements of the bomb making. but what's different about this is they took a simple recipe and then targeted a -- the boston marathon. >> reporter: why the marathon? because, officials say, it was there, essentially. and easy. not long in the planning either. >> it does appear though that the younger brother had not become involved until later in the process, perhaps a week or so before the actual attack. >> reporter: jones says the brothers seemed to have been inspired by the internet preachings of anwar al awlaki, the charismatic american-born al qaeda jihadist who has been dead now more than a year and a half. >> the older brother appeared to be the more radicalized of the two and drove both the need to conduct the attack as well as the preparation of the attack, that is, building the bombs. >> reporter: as for what drove tamerlan? his younger brother claims it was hatred of america. >> he may have been angry ab

and i want to bring colonel leighton in to discuss this and seth jones, a terror expert and author of a book on al qaeda o hunting al qaeda. thank you very much to both of you. colonel, what is your take on that? the fbi said, look, we did question the older brother, tamerlan, the other night. we questioned him two years ago at the request of a foreign government who thought he had links to extremism and determined at the time that there was nothing derogatory, their word, but him. therefore, they moved on. when you hear that and you think about what happened now, we've also of course reported that that young man went to russia, spent six months there, came back after that time and was -- was spending more time on extremist web sites, are you concerned? is this something that we should have picked up before or not? >> i do think it is something that we should have picked up before because it's always a missed opportunity when you get something like this, you have an opportunity to question somebody of this type and you don't follow up on it. now, it is possible that he didn't have the

seth jones associate director of the security defense policy center at the rand corporation. former member of the joint terrorism task force and jeffrey toobin our legal analyst. jake is saying -- this is significant in terms of the information in this. but obviously a crucial question out there which is was it obtained before or after those miranda rights were read? >> the irony here is what he is saying is not particularly helpful to him. what would be helpful to him is if he had a conspiracy he could make the government to make a deal to avoid the death penalty. if he is simply saying it is me and my brother, what does he have to negotiate with? >> there's no one to else to give up. >> right. >> and frankly, i'm not so sure the miranda issue matters so much. there looks like so much evidence in the case any way. >> they don't even need it. >> what difference does it make if they have a confession from him from his hospital bed? >> right. >> he's going to get convicted any way. yes, and that's a legal issue that may have to be sorted out but in the larger scheme of the case

seth jones is the associate director of the international security and defense policy center. great to have you with us. you've been out there looking for people. i just wanted to throw up a graphic. six major lists. you have tide list with more than 700,000 names. you have another terrorist screening database with 423,000 names. tsarnaev was said to be on that list. then there's a select d list with 14,000 names. a no fly list with 10,000 names and the kill list, we don't know exactly how many names are on that. does it make sense to have all of these lists? >> so, look, i think most of these lists are to be used as references. they're not generating leads, open investigations. it depends on how they're used. they can be useful just as a resource for some organizations, but again, i'm not exactly sure how all of those databases interact at this point. >> and i guess that's a big point. let's talk about the tide list in particular. the big one. 700,000 names. helpful? >> look, i think it's helpful to have a list of people who come under suspicion, whether they're by u.s. agenc