TOKYO -- The U.S. is working to keep some technology made in China out of American markets, citing concern about "back doors" that could compromise sensitive information -- a tactic Washington has used itself.
Politics
US cites security risks in clampdown on Chinese tech
Washington fears spying through back doors in gear from Huawei and peers
The U.S. government has maneuvered to keep devices made by China's Huawei Technologies out of American markets.
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