Service members who've recently returned from Liberia in support of the U.S. Agency for International Development – led mission, Operation United Assistance, compete in a ping pong tournament while undergoing the 21-day controlled monitoring, Joint Base Langley Eustis, Va., Jan. 10, 2015. This is one of many games that has been organized for troops in controlled monitoring. The others include basketball, flag football and weight lifting. OUA is a Department of Defense operation in Liberia to provide logistics, training and engineering support to U.S. Agency for International Development-led efforts to contain the Ebola virus outbreak in western Africa. (U.S. Army photo by Sgt. Matt Britton 27th Public Affairs Detachment/Released)