nadya? >> we called out with radios that we could hear her. then outside, the team leader was trying to find out where she could be. >> the basement level below is still intact and may allow members to access the woman. but there's although challenge. >> they must work ten feet above the floor, drilling holes into the concrete ceiling. each time they insert an extremely small specialized search camera that allows them to see into the vast darkness. the process is agonizingly slow. >> all the sudden, there's a pull on that camera. i lose the grip. the camera is going -- not thinking, just pulling back. then we took a few seconds of ah, we have contact. >> it's what they have been hoping for. >> then we took a few seconds of signaling back and forth.

nadya? >> we called out with radios that we could hear her. then outside, the team leader was trying to find out where she could be. >> the basement level below is still intact and may allow members to access the woman. but there's although challenge. >> they must work ten feet above the floor, drilling holes into the concrete ceiling. each time they insert an extremely small specialized search camera that allows them to see into the vast darkness. the process is agonizingly slow. >> all the sudden, there's a pull on that camera. i lose the grip. the camera is going -- not thinking, just pulling back. then we took a few seconds of ah, we have contact. >> it's what they have been hoping for. >> then we took a few seconds of signaling back and forth. and then turns the camera and i can see her face. >> it is an incredible moment. for the first time, they see the woman. >> she couldn't even turn around. it was so tight, the space she was in. >> the team, fighting exhaustion, is energized. >> when you get into action like that, time flies. it's no