Familes and Children Held In U.S. Customs and Border Protection Processing Facility [Getty Images]

BROWNSVILLE, TX - JUNE 18: Detainees sleep in a holding cell at a U.S. Customs and Border Protection processing facility, on June 18, 2014, in Brownsville,Texas. Brownsville and Nogales, Ariz. have been central to processing the more than 47,000 unaccompanied children who have entered the country illegally since Oct. 1. (Photo by Eric Gay-Pool/Getty Images)

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