Sam Sells, military liaison for U.S. Agency for International Development, talk with a crowd of children in Zorzor, Liberia, Nov. 18, 2014. United Assistance is a Department of Defense operation to provide command and control, logistics, training and engineering support to USAID -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)