KASHGAR, China (AFP) - Chinese authorities Friday announced stepped up controls on religious figures and potential "trouble-makers" in the Muslim city of Kashgar as the Olympic Games opened in Beijing. The order by the Kashgar government followed an attack that killed 16 police officers and a new threat by ethnic Uighur separatists from China's far northwest Xinjiang region to attack the Games. "To ensure stability, (authorities) have strengthened controls on non-residents to root out trouble, and stepped up controls on key people, religious figures and trouble-making petitioners to stay abreast of things," said an announcement on the city government's website....