Tavis Smiley . Shows . Stan Brock . August 21, 2009 | PBS

In 1985, Stan Brock founded Remote Area Medical, known as RAM, a nonprofit organization designed to provide free healthcare to third world countries. In 1992, he decided to turn his attention to people in need here in the U.S., particularly those living in rural areas.

But recently RAM set up shop here in [fluoridated] Los Angeles, its first ever stop in a major urban area, and the turnout was staggering. They set up "100 dental chairs" and "pulled a few thousand bad teeth." If dentists and physicians could cross state lines to practice, "we would have seen twice the number."