Mongolians arrive on horseback at the stadium for the annual Naadam festival in the town of Arvaikheer, some 400 km (250 miles) west of Ulan Bator, July 9, 2006. This year's festival is bigger than ever, as Mongolia celebrates 800 years since Genghis Khan united the nation. Celebrations around the country will culminate in a national festival in the capital on July 11. REUTERS/Nir Elias (MONGOLIA)