about that. and that's their major fear. >> troubling when you think about that. authorities are doing what they can to put precautions forward before this weekend. we're learning the nypd will have bomb-sniffing dogs and heavily armed police squads out on the streets. but are there other measures the public may not be aware of that authorities are likely to take this year to counter the terror threat? >> i think the fbi will be more aggressive than the police. they'll knock on people's doors, get search warrants try to look through people' stuff, see if they have a weapon. it's that kind of connection they're looking for. whether there's an overt act that one of these people take. it's a needle in a haystack. they are on this. but one is going to get through eventually. >> i keep hearing when i talk co counterterrorism officials hearing the word defuse. it's so hard to keep track and detect all the threats out