U.S. Air Force Staff Sgt. John May, left, and Senior Airman Alex Vincent, both with the 123rd Contingency Response Group, Kentucky Air National Guard, carry equipment into the joint operations center during Operation United Assistance Oct. 5, 2014, at the L?opold S?dar Senghor International Airport in Dakar, Senegal. The Airmen stood up an intermediate staging base at the airport to funnel humanitarian supplies and equipment. 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)