the shooter goes through the checkpoint and then moves down this long passageway towards the food court. so, how does he move all this way and not get stopped by anyone else -- by any other law enforcement. what we did learn at this press conference that's just concluded, they tell us that law enforcement responded very quickly and did chase him, if you will, down that passageway. and while they were going after him, other officers arriving at the scene of the downed tsa personnel and rendering extraordinary assistance to the mortally wounded tsa officer using their emergency first aid packs, anything they could, to try and save him until paramedics could arrive in the middle of all of this, even putting him into an airport wheelchair and trying to get him out of there and get him to an ambulance as fast as possible. of course, sadly, tragically, we know that man lost his life.