miner edison peÑa didn't have the slightest idea who letterman was, but he was having a wonderful time feel like... >> back in copiapo, though, peÑa was hospitalized for anxiety and depression, and he was not alone. mario sepulveda, that most exuberant of men, was on heavy medication. the oldest miner, mario gomez, found it impossible to sleep. alex vega? he couldn't explain why he was doing it, but he was building a wall around his house. >> whenever i hear a noise, i get scared and look around me. my heart beats faster. i can't go into small spaces. i'm taking five or six pills a day now. if i don't take them, i can't sleep, and i wouldn't even be able to sit here. >> all but one of the 33 men, doctors say, have suffered severe psychological problems since the accident. and the miners complain they weren't getting the quality medical care and benefits they needed and were promised. 19 had already lost their disability payments. sebastian piÑera is chile's president. >> couple of the miners told me that they feel like they're soldiers. they're heroes during the war, and when the war i