and this is stanley brock. for the next three days, brock and a team of volunteers will turn this fair ground into a make shift hospital, providing medical care to more than 2500 people. >> people are showing up. >> reporter: and "nightline" was invited along to watch. >> it is always an amazing sight, isn't it? that here in america, at 5:00 a.m., with rain threatening, there is 1500 people out there. >> how are you doing? towards the front of the line, the horaney family is waiting, the early hours trying the twin's patience, this is the second year they have come. as a family, are you looking for dental and vision? >> they do, but what they have doesn't cover enough. we bring them here, once a year. >> reporter: brian and heather will get their teeth looked at. >> i have a couple of cavities that need to be filled. >> reporter: for their teenagers, their eyes. >> i have glasses. >> reporter: what is your ticket number? >> we're 101 to 110. >> reporter: the lowest numbers will get in first. those with the high