A Liberian guard takes the temperature of a member of Joint Forces Command – United Assistance prior to a tour of a U.S. Army mobile Ebola testing lab built in support of Operations United Assistance in Zwedru, Liberia, Dec. 10, 2014. United Assistance is a Department of Defense operation to provide command and control, logistics, training and engineering support to U.S. Agency for International Development-led efforts to contain the Ebola virus outbreak in West African nations. (U.S. Army Photo by Sgt. 1st Class Brien Vorhees, 55th Signal Company (Combat Camera) / Released)