Major Todd Balog, an orthopedic surgeon attached to 86th Combat Support Hospital, conducts a final medical screening of service members deployed in support of Operation United Assistance as they prepare for departure from Roberts International Airport outside of Monrovia, Liberia, Feb. 1, 2015. All troops will go through 21 days of controlled monitoring at one of the controlled monitoring areas in Joint Base Lewis-McChord, Wash., Joint Base Eustis-Langley, Va., Fort Hood, Texas, and Fort Bliss, Texas. United Assistance is 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 western Africa. (U.S. Army photo by Spc. Rashene Mincy, 55th Signal Company (Combat Camera)/ Released)