United States Airmen assigned to the 633rd Medical Group stationed at Langley Air Force Base, Va., begin construction on the Monrovia Medical Unit site in Monrovia, Liberia, Oct. 7. The MMU is being constructed in the event that any of the medical workers in the area catch Ebola while assisting in Operation United Assistance. The U.S. Agency for International Development is the lead U.S. Government organization for Operation United Assistance. U.S. Africa Command is supporting the effort by providing command and control, logistics, training and engineering assets to contain the Ebola virus outbreak in West African nations.