U.S. soldiers assigned to Bravo Battery, 4th Battalion (Airborne), 319th Airborne Field Artillery Regiment, 173rd Airborne Brigade Combat team board a CH-47 Chinook helicopter during a mission rehearsal exercise (MRE) at the Joint Multinational Readiness Center in Hohenfels, Germany, March 17, 2014. The MRE was conducted at the 7th Army Joint Multinational Training Commands Grafenwoehr and Hohenfels Training Areas in order to prepare subordinate battalions of the 12th Combat Aviation Brigade to deploy to Afghanistan to provide medical evacuation and combat support to the NATO International Security Assistance Force mission. (U.S. Army photo by Spc. Justin De Hoyos/Released)