U.S. Air Force Senior Airman Alex Vincent, an aerial porter with the 123rd Contingency Response Group, Kentucky Air National Guard, drives a pallet of red blood cells and frozen plasma to a waiting C-130 Hercules aircraft during Operation United Assistance in Dakar, Senegal, Oct. 10, 2014. United Assistance is a Department of Defense operation to provide 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. Air National Guard photo by Maj. Dale Greer/Released)