kalashnikov rifles and hit us. you are looking for a medical emergency evacuation routes. god forbid, you have a heart attack. how do you get them out? 250,000 people, how to get through the crowd? how do you hide explosions? are there drones? is there a threat from reagan airport? finally, you are looking for other things. is there piping underneath the street that could burst? is there potential for a fire?e? those are your big six threats. they're walking on the street right now, going through the buildings, thinking of an a-z plan to mitigate all of those big six plans. >> bill: they are sweeping the route, looking underground, looking aboveground, they are doing all of these things. one final thing, the terrorist weapon of choice now in europeue seems to be trucks and vehicles smashing through, exploding, and all of that.ve how do you stop that? >> yeah, this is a really big deal. we are taking the new york cityo model. the nypd has used this model for years at the u.n. you just get a bunch of big trucks, you fill them with really heavy things, like sand, and really, they are immovable objects.