U.S. Army Capt. Michael Campbell, an Institute of Surgical Research burn flight team member at the San Antonio Military Medical Center, tends to a patient receiving treatment with an extracorporeal membrane oxygenation system on a C-17 Globemaster III at Joint Base San Antonio-Lackland, Texas, Jan. 16, 2013. ECMO is a heart-lung bypass system that circulates blood through an external artificial lung and sends it back into the patient’s bloodstream. (U.S. Air Force photo/Staff Sgt. Kevin Iinuma)