A U.S. Marine Corps Tug from SPMAGTF Crisis Response-Africa tows a U.S. Army UH-60 Black Hawk helicopter in Monrovia, Liberia, Oct. 31, 2014, in support of Operation United Assistance. Operation United Assistance provides command and control, logistics, training, and engineering support to U.S. Agency for International Development efforts to contain the Ebola virus outbreak in West African nations. (U.S. Marine Corps photo by Lance Cpl. Andre Dakis/SPMAGTF Crisis Response-Africa Combat Camera/Released)