What the Origins of Handwashing Says About the Medical Establishment

Dr. Mark Gordon is an expert in the field of neuroregenerative medicine and the treatment of Traumatic Brain Injuries.

SFC Andrew Marr is a Green Beret, co-founder of the Warrior Angels Foundation, and author of "Tales from the Blast Factory". He is also one of the subjects in the new documentary "Quiet Explosions" available now.