FILE - In this Dec. 3, 2014, file photo, cars wait to enter the United States from Tijuana, Mexico, through the San Ysidro port of entry in San Diego. An increasing number of people from far-flung corners of the world quietly have tried to sneak into the United States among the hundreds of thousands of other, mostly Latin American migrants caught at the Mexican border in 2015, according to arrest data from the Homeland Security Department. (AP Photo/Gregory Bull, File)
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