A CH-47 Chinook helicopter crew chief with Task Force Iron Knights, 2nd Battalion, 501st Aviation Regiment, 1st Combat Aviation Brigade, 1st Armored Division, looks down the side of the aircraft from its ramp during a mission over Liberia, Dec. 12, 2014. Task Force Iron Knights deployed in support of Operation United Assistance from Fort Bliss, Texas, two weeks after being notified of their mission. The Iron Knights are the DoD’s primary means of transportation to locations throughout Liberia, especially remote villages. Operation United Assistance 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)