U.S. Marine Col. David. S. Bunn speaks with Nigerian Col. A.E. Abu Bakar prior to a concept brief concerning Operation United Shield in Monrovia, Liberia. The Armed Forces of Liberia and the U.S. formed a combined command known as United Shield to construct Ebola treatment units as part of the 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.