bob woodruff. >> reporter: wise, virginia, is a coal mining county far from any major airport, stan brock over 700 expedition as brock calls the clinics since 1985. this idea came to him when he was injured on a cattle ranch in the amazon, 26 days on foot from the nearest doctor to help ot r others he brought medical tees to other undeveloped countries like india, haiti. >> good morning. >> reporter: but what brock quickly learned was that there was desperation in the u.s., as well, especially in places likewise where jobs have disappeared and few doctors hang their shingles. >> sort of one-time opportunity that they know they can afford to get the care that they need. >> reporter: the wise clinic is one of the largest that they do here in the united states, serving some 2500 people. and on the second morning, hundreds again line up in the predawn darkness for a chance to see a doctor. >> so the first thing we're going to do is bring in the people left over and waiting here for what, some of them 24 hours or more. >> you're going, folks. >> reporter: among the hundreds streaming in the ra