An MV-22B Osprey assigned to SPMAGTF Crisis Response - Africa returns to base after dropping off supplies to personnel supporting the Ebola relief effort, as part of the Marines final mission in support of Operation United Assistance in Liberia, Dec. 1, 2014. United Assistance is a Department of Defense operation that provides 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. Marine Corps photo by Lance Cpl. Andre Dakis/SPMAGTF-CR-AF Combat Camera/Released)