A simulated hostile crowd charges towards Indonesian airmen practicing checkpoint procedures at a simulated United Nations checkpoint at Five Hills Training Area in Mongolia during Khaan Quest 2011, Aug. 9. Khaan Quest is a joint-exercise hosted by the Mongolian Armed Forces in partnership with U.S. Pacific Command forces. Exercises like this enhance the capabilities of the partner nations involved so they may operate as one when conducting joint peacekeeping missions around the world. Khaan Quest officially started July 31 and concluded Aug 12.