Tech. Sgt. Jerry Sayasene, a flight engineer with the 438th Air Expeditionary Advisory Squadron, performs a communication check with the pilot of an Afghan air force MI-17 prior to a supply flight over northern Afghanistan, Dec. 21, 2011, at Kabul International Airport. Sayasene is currently deployed to provide advisory training for Afghan air force flight engineers. (U.S. Air Force photo by Staff Sgt. Nadine Y. Barclay)