U.S. Air Force Airmen assigned to the 633rd Medical Group walk towards a C-17 Globemaster at Langley Air Force Base, Va., Sept. 26, 2014. The 633rd MDG deployed to West Africa in support of Operation United Assistance, where they will deliver and build the Air Force’s Expeditionary Medical Support System. Langley Airmen will not be involved in treatment of patients exposed to the Ebola virus. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)