Ellen Johnson Sirleaf, president of Liberia, with by Madame Deborah Malac, U.S. Ambassador to Liberia and Bill Berger, USAID Disaster Assistance Response Team leader, exit an Mv-22 Osprey in Foya, Liberia. The U.S. Agency for International Development is the lead U.S. Government organization for Operation United Assistance. U.S. Africa Command supported the effort by providing command and control, logistics, training and engineering assets to contain the Ebola virus outbreak in West African nations.