At the Age of 50, Dr. Melvin Cheatham was tired of just talking about his faith. Despite having all the signs of a fruitful life -- a loving wife, beautiful children, a thriving medical practice, and material comfort -- a desire stirred inside him to make a greater difference in the world. Within weeks of hearing Franklin Graham discuss the need for overseas mission doctors, Dr. Cheatham found himself on a mission trip to South Korea. And then to...