U.S. Air Force Staff Sgt. Travis Riley, left, 633rd Logistics Readiness Squadron air transportation craftsmen, hands tie-down chains to Staff Sgt. Matthew Marsh during a U.S. Transportation Command Joint Task Force - Port Opening exercise at Langley Air Force Base, Va., Nov. 28, 2012. Soldiers and Airmen worked together in a joint mission to support the assessment of an airport opening at an alternate location for a simulated-national disaster. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)