caption: FIVE HILLS TRAINING CENTER, Mongolia (Aug. 1, 2007) â??The Mongolian Armed Forces clash during a mock horse-mounted battle during the opening ceremony of Khaan Quest 07 here Aug. 1. This nomadic country is hosting the multinational peacekeeping exercise for the second year in a row. (Official U.S. Marine Corps photo by <PERSON>. G.S. <PERSON>)