Medical practices around McAllen, Texas have been under a journalistic microscope for years. But no one knows what's happening on the ground better than the doctors themselves - especially those who are trying to build up, not tear down, their local medical systems. Dr. Carlos Cardenas, Chairman of the Board and Chief Administrative Officer at DHR Health in the lower Rio Grande Valley, joins us to talk about the challenges he faces in delivering patient care, and how he overcomes them.