Tiananmen anniversary marked by crackdown, HK vigil ban

Chinese paramilitary police officers march in formation along a sidewalk adjacent to Tiananmen Square in Beijing, Thursday. (AP Photo/Mark Schiefelbein)

BEIJING — China tightened controls over dissidents while pro-democracy activists in Hong Kong and elsewhere sought ways to mark the 31st anniversary Thursday of the crushing of the pro-democracy movement centered on Beijing’s Tiananmen Square.