U.S. Customs and Border Protection security cameras scan license plates as motor vehicles cross the U.S.-Mexico border from Tijuana, Mexico, in September 2016 in San Ysidro, Calif.
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U.S. Customs and Border Protection security cameras scan license plates as motor vehicles cross the U.S.-Mexico border from Tijuana, Mexico, in September 2016 in San Ysidro, Calif.