there's tight security but any signs of threatening or hostile behavior the professionals here on the ground do not mess around. >> bill: just to give our viewers a sense of the geography based on what we understand, mike, the vehicle stoppage occurred around the library of congress. but the come driving got all the way to botanical gardens. that's several blocks. i'm going to guess half a while. perhaps more. what is your guess? >> at least several blocks. to give you a sense of the geography to my left over here is the rayburn house office building. as you come back this direction you get towards where the car is stopped and between the rayburn house office building and the united states capitol building is where you find the cordoned off area with lots of police vehicle and the suspect vehicle in the middle of it. a sensitive area between the house office building where many house members have their offices