Terroristic Activity News Today

>> well, you know, i -- the marathon is a pretty special day around here, as you know. and i started this morning visiting mayor menino in the hospital who was devastated he couldnt be at the marathon today. hes on his way here now, i think, am i right? from the hospital. so obviously he is as concerned as rest of us are about the safety of people who come for this iconic experience here in the city. >> can you address reports that youre looking for a specific kind of truck or specific kind of p...

Looking at that tape right now? let me go to clint van zandt. hes standing by. clint, you know, youre an fbi profiler. a lot of this, the evidence, the technical things that are happening right now is it find out who could be responsible. and i was asking evan, the world has changed, for example, since the atlanta bombing. clint, you have cameras on every corner these days. is that the first source or one of the major sources for the investigation? >> yeah, well, theyve got a lot going on. numbe...

Set to go off 10 or 15 minutes later hoping to catch first responders? >> yeah. >> so we dont know how sophisticated it is. what we do know right now is this is not a natural source. this is not an accident. this is some type of criminal/terroristic activity. >> to your point, clint, you make this point about it doesnt have to be sophisticated. for example, with "the new york times" bomber, this was a guy who had bumbled, if you will, according to analysts, his waypa vehicle, so much so it start...