U.S. Airmen with the 633rd Medical Group are welcomed home at Joint Base Langley-Eustis, Va., Oct. 20, 2014. The Airmen deployed to West Africa for nearly one month in support of Operation United Assistance. 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.