Meet United States Naval Corpsmen John Opalski & Sergio Acosta. John served in the 1st ever SHOCK TRAUMA unit in modern HISTORY in the IRAQ war (2 TOURS) & Sergio was attached to the Marines unit known as the "BALLS of the CORPS" in the most REMOTE part of AFGHANISTAN to ever have AMERICANS. Whats it like to be a medic in the most hostile settings? You won't ever forget this one.