Col. Heath Roscoe, center, the commander of the 36th Engineer Brigade, inspects an Ebola treatment unit before it's handed over to U.S. Agency for International Development, Jan. 2, 2015, Voinjama, Liberia, in support of Operation United Assistance. Operation United Assistance is a Department of Defense operation in Liberia to provide logistics, training and engineering support to USAID-led efforts to contain the Ebola virus outbreak in western Africa. (U.S. Army photo by Sgt. Ange Desinor, 13th Public Affairs Detachment /RELEASED)