Duffel bags and suitcases sit outside the Langley Transit Center at Langley Air Force Base, Va., Dec. 4, 2014. Several Service members from multiple branches of the U.S. military underwent a 21-day controlled monitoring period at the transit center after returning from West Africa in support of Operation United Assistance. (U.S. Air Force photo by Airman 1st Class Breonna Veal/ Released)