if this is one person who's been inspired from overseas, it's very, very difficult to defend against that. >> malcolm nance, this is where we enter your expertise. one of my point that four seconds before this happened, this was just a car. after this sudden left turn, it was a terrorist weapon. >> absolutely right. and, you know, keir brings a very important point to the table. as your question indicated, what level of security do we want? what level of security we need. if you leaf it to counterterrorism professionals like, my we'll be building 20-foot high texas barriers around your building and it will look like downtown baghdad, tanks on the street corners. this is not what we are. as we are as a nation, both nations allied -- >> as you talk, this is new york city police officers. >> emergency responses for new york city. you can elevate it a little bit so that the terrorist -- the