Chinese police and paramilitary troops have been making sure today that there are no public commemorations of the events from 25 years ago. That's when troops moved in on reform-minded protesters in Beijing's Tiananmen Square, killing hundreds -- if not thousands -- or protesters and onlookers.
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Police and troops today patrolled the square and the surrounding streets. They stopped vehicles, and demanded identification from passers-by.
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Chinese censors removed comments about the crackdown from domestic blogs and social media websites.
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Some relatives of the victims were allowed to pay their respects at cemeteries, but only with police escorts. Others did so at home, under surveillance, with guards standing watch outside.
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The Chinese government has largely ignored the demands from relatives of the victims for an admission of wrongdoing, and a formal accounting of the crackdown and the number of casualties.
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The silence on China's mainland wasn't matched in Hong Kong. Organizers say more than 180,000 people took part in an annual candlelight vigil to remember the victims.
