|U.S. Air Force photo by Staff Sgt. Gustavo Gonzalez|
U.S. Marines and U.S. Public Health Service members return during Operation United Assistance at Roberts International Airport in Monrovia, Liberia, Oct. 31, 2014. The operation is providing command and control, logistics, training and engineering support to the U.S. government’s efforts to contain the Ebola virus outbreak in West Africa.