CHINA

A cross China, tens of thousands of people tagged as trouble-makers are trapped in a digital cage, barred from leaving their province and sometimes even their homes by the world's largest digital surveillance apparatus.

Most of this technology came from companies in a country that long claimed to support freedoms worldwide: the United States.

Over the past quarter century, American tech companies to a large degree designed and built China's surveillance state, playing a far greater role in enabling human rights abuses than previously known, an Associated Press investigation found.

They sold billions of dollars of technology to the Chinese police, government and surveillance companies, despite warnings that such tools were used to quash dissent, persecute religious sects and targe

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