A rigger with the 372nd Inland Cargo Transportation Company connects a cargo net to a sling strap during a sling load operation at Roberts International Airport, Liberia, Dec. 12, 2014. The airlift was to transport incinerators to a new Ebola treatment unit built in support of Operation United Assistance. United Assistance is a Department of Defense operation to provide command and control, logistics, training and engineering support to U.S. Agency for International Development-led efforts to contain the Ebola virus outbreak in West African nations. (U.S. Army Photo by Sgt. 1st Class Brien Vorhees, 55th Signal Company (Combat Camera) / Released)