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Cte is unbelievable. first begins to impair part of the brain that controls the emotion and memory. it eventually spreads to overwhelm the brain. the brain shrinks to half its size in chronic cte. >> it starts to affect every single part of who you are. you become a shell of the man or person you were initially. already -- you know, you talk about this being linked to the concussions in the nfl, which is what everybody is saying. already 62 concussions have been reported in this season alone for the nfl. the good thing is they're trying to take a look at these things and if it's a concussion, ...

To be. he says this much. cte is unbelievable. first begins to impair part of the brain that controls the emotion and memory. it eventually spreads to overwhelm the brain. the brain shrinks to half its size in chronic cte. >> it starts to affect every single part of who you are. you become a shell of the man or person you were initially. already -- you know, you talk about this being linked to the concussions in the nfl, which is what everybody is saying. already 62 concussions have been reported in this season alone for the nfl. the good thing is they're trying to take a look at these things ...

Wreaked so much havoc there. police officers, barbara, were at security checkpoints at l.a.x. why is that no longer the case? and is that being revisited? >> well, it may well be revisited. it turns out our dan simon in los angeles has learned that armed police officers were -- used to be right at the tsa checkpoint. now after some back-and-forth between the police officers groups and the tsa, they were allowed to go a little bit further, to patrol a little bit, to move around inside the terminal as long as they were two minutes away from being able to get right back to that checkpoint if ther...

Los angeles is really tough. as a former los angeles resident myself, you know, i know each of those terminals well, but there are so many. so, los angeles a very tough place because they have so many portals into the airport. but, yes, i do think you need an armed guard, an armed personnel, law enforcement at the gates and i do think it has to be law enforcement for many reasons. but you cannot arm all the tsa. because when you arm a federal officer, it puts them in a different rank. you have to requalify on the firearms. a lot of my employees were armed. you have to requalify every 30 days. ...

>> sure. >> i want to put up this picture, this is a picture -- can we put this up. this is new that we just got in here to cnn. this is the young man who died yesterday in that shooting. his name is gerardo hernandez. gerardo hernandez. and this is a picture of him. this is from his family. our chris lawrence is out there in new jersey, with the family. the family, obviously shocked the community shocked -- i'm sorry, he's out there with the family of the suspect, i'm sorry. but obviously the family of this young man shocked as well as the country about this. mary, this is sad time for the ts...