Stan Brock (Knoxville, TN), Founder of Remote Area Medical (RAM), a non-profit, volunteer relief corps dedicated to providing free health care, dental care and eye care to people in remote areas of the United States and the world, discusses medical care in Guyana, a country off the northern coast of South America. For additional information, please visit www.ramusa.org. Second guest, David Elkowitz (Big Bend National Park, Texas), Chief of Interpretation, discusses what is sometimes considered three parks in one, Big Bend's mountain, desert and river environments - an hour's drive can take you from the banks of the Rio Grande to a mountain basin nearly a mile high (Part 2). For additional information, please visit www.nps.gov/bibe.