U.S. Air Force Capt. Christopher Lien, a pilot for

U.S. Air Force Capt. Christopher Lien, a pilot for the E-3 Sentry, Airborne Warning and Control System, from the 963rd Expeditionary Airborne Air Control Squadron, receives an in-flight refueling from a KC-10 Extender during a combat support mission over an undisclosed location, Southwest Asia, Jan. 30, 2013. The E-3 Sentry is an aircraft with an integrated command and control battle management, or C2BM, surveillance, target detection, and tracking platform. Lien is from the 964th Airborne Air Control Squadron which is part of the 552d Air Control Wing at Tinker Air Force Base, Oklahoma. (U.S. Air Force photo/Tech. Sgt. Dennis J. Henry Jr.)