China steps up anti-terror measures

Beijing police officers, including the elite Snow Leopard Commando Unit, show off their skills at handling attempted terror attacks, hijackings and large-scale protests in Beijing on May 29, 2014. Police officers and commandos in Beijing showed off their anti-terrorist prowess, days ahead of the 25th anniversary of the Tiananmen crackdown and following a string of separatist attacks. CHINA OUT AFP PHOTOSTR/AFP/Getty Images

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    China steps up anti-terror measures

As the 25th anniversary of Tiananmen Square approaches, officials step up anti-terror training. Michael Holmes reports.