joining me valerie amos and david muir. he just returned from the region this week. here's a look at some of his reporting. >> a pediatric surgeon from springville, illinois, now helping here. she shows us the baby wrapped in a special heating blanket, even in the stifling desert, keeping her tiny body going. another key here, a simple suppment made of peanuts and milk powder, saving lives one mini meal at a time. and there was this baby. while we could see only the outline of her fragile body, the hospital director saw something else. she was sitting up for the first time, and she's gained a whole pound. >> she's only been here two days. >> this is the third day. >> you can say she's going to be okay? >> yes. >> the refugees spilling into the desert, and the doctors who come to them. >> this is an ambulance. >> when he takes us inside, a crush of families, mothers putting their children in a sort of hanging bucket to weigh them. they're noticing something here, that the hunger goes well beyond babies and toddlers. it's the olr children, too. >> when you see malnutri