search as what happened at ground zero after 9/11 at the world trade center. it is now considered sacred ground. they have to be very careful. it s a forensic exploration of the mud. and it s so much of it that they have to dig through, knowing that there could be pockets with possible survivors underneath. but also knowing, realistically, that likely there are many, many victims buried underneath the mud. the mud wall that came down, we heard a geologist earlier today describe it as, if it were concrete, it would be the volume, enough to pour three hoover dams, coming down the mountain, towards the city, the town of people, at 30 miles an hour. so everything in its path was pretty much obliterated and that s what they re dealing with as they search with dogs and their bare hands as the best tools in this case. jennifer, thank you for that. a tough story. joining us now with more on all of this, how all this happens and where it could happen again,
is going to be tough going. they can t bring armored vehicles in. they will start here, crossing the irrigation canals and very small bridges as you see. they will be on foot after getting awe of their he off h and they will be in mud walls surrounding the fields, and many of these are mud walls and irrigation canals and look at this compound here, a mud wall surrounding the compound. how do they know who is in there? they have to be careful about civilian casualties. they can t just start shelling these places. talk to me about that. the notion is that air power which is so effective in many places can t be used that strongly here. i don t think that you will see a single bomb dropped here. this is going to be foot patrols, slogging through these fields, villages, towns and these compounds, figuring out who is there, and that is when you run into the problem. they will run across ieds, snipers and ambushes, and they