U.S. service members deployed in support of Operation United Assistance board a plane at Roberts International Airport, outside of Monrovia, Liberia, before their departure for the United States, Jan. 1, 2015. U.S. service members deployed in support of Operation United Assistance board a plane at Roberts International Airport, outside of Monrovia, Liberia, before their departure for the United States, Jan. 1, 2015. SHARE: Download: Full Size (2.32 MB) Tags: photo essays Credit: VIRIN: 092727-K-LNF67-300.jpg Photo Gallery