Armed Forces of Liberia engineers work on the Tubmanburg Ebola treatment unit. Crews quickly put up a series of tents on freshly leveled and graveled ground. 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.