you never get used to it, ander sob. it's just painful to watch. >> there's a lot of families waiting for word of their loved ones, not just a children of that elementary school. but people all throughout this area, gary, we're going to continue to check in with you and also bring in george howell who is also in another vantage point, also. george, you have been there for hours, as well. darkness has come. what are you seeing in here from people around you. anderson, you know, you obviously see the lights over there where gary was talking about. where you see the overhead scene of these rescuers doing their best. to go through the rubble. what we've seen right here on this side of the school, we've seen one after another, sheriff's deputies, we've seen investigators, we've seen a line of people going over into that school. look at this. let's pass over. this is an example of what we're talking about. they're coming in, they're going out, they're doing their very best to find people in that school. we've seen scenes like

so the entire span of time that his sister has been missing, ander sob. >> just incredible. >>> earlier, i spoke with woio reporter dan derose about what he's learned. >> we're also hearing that for many of the first years that they were in the home, there were chains being used, one room in particular was found with chains hanging from the ceiling. they were bound and gagged several times throughout the course of being held in that home. we're also hearing from a source that the man who was holding them there, ariel castro would play this little dangerous game. that he would tell the women he was about to leave the home. and then he would wait. and if one of them tried to open that door, he would go in and attack them. that was one of the ways he was able to keep them there. we are also hearing from pretty well-placed sources that numerous times throughout this ten-year period that some of the women became pregnant, that they would be beaten, forcibly hit in the stomach to force a miscarriage. one of the reasons we're hearing that, they brought out cadaver dogs to search the backyard o

intestinal symptoms, but after a day or so those went away, they're being monitored protectively, ander sob. >> they're going to be looking at the letters for any dna evidence that is there? >> absolutely. investigators from the fbi as well as the nypd, they're looking at a specific location, the postmark on those letters giving them some indication as to where the person who sent them might live. anderson? >> joining us now is national security analyst and george w. bush homeland security adviser fran towson. also on the phone, chief medical correspondent dr. sanjay gupta. the letters mention the gun control debate. it could be more of a political threat than a terror threat, really? >> that's right, anderson. as you mentioned, that's not really at the moment the most relevant piece to the investigators. they don't care about motive at the moment, they want to know who. to determine the who, they'll look for forensics, saliva, hair, fingerprints on the envelope. they'll analyze the handwriting, but all these things take time, which is why the first thing they're going to focus on is the la