Thermometers used to check U.S. Service members temperatures at the Langley Transit Center wait to be used at Joint Base Langley-Eustis, Va., Nov. 27, 2014. The members recently returned from Liberia supporting Operation United Assistance, a Department of Defense operation in Liberia to provide logistics, training and engineering support to U.S. Agency for International Development-led efforts to contain the Ebola virus outbreak in West Africa. (U.S. Air Force photo by Staff Sgt. Gustavo Gonzalez/Released)