to the u.s. have capabilities they need to pay attention to. jon: you're saying there are three pakistanee man that may be u.s. citizens? >> we everee seen that before, that is the intelligence that's been talking about. intelligence is an art form rather than something totally specific. that's what security officials are looking for right now. jon: they are also looking for a needle in a haystack or so it would seem. we have been looking at video from the entrance of one of the tunnels that swings into man hat and from new jersey, obviously police are searching trucks. what specifically are they looking for, can you tell us? >> what they are trying to do obviously is prevent a device from getting into the bridges or on to the tunnels. the way you do that is you slow stuff down, which of course is an inconvenience for the commuter but essential in to keep control of the situation. the officers, inspect, examine. they are reaching out. it was a security call for all the security agencies in the