U.S. Air Force Staff Sgt. Nicholas Burdick, a vehicle maintainer assigned to the 621st Contingency Resopnse Wing at Joint Base McGuire-Dix-Lakehurst, N.J., releases stress by playing a game of cards at Roberts International Airport, Republic of Liberia, during Operation United Assistance, Oct. 15, 2014. OUA is a U.S. Joint Forces Command-led operation to provide command and control, logistics, training and engineering support to the U.S. government’s efforts to contain the Ebola virus outbreak in West African nations.