In this July 12 photo, Central American migrants rode a freight train during their journey toward the U.S.-Mexico border in Ixtepec, Mexico. The number of family units and unaccompanied children arrested by Border Patrol in the Rio Grande Valley has doubled in the first nine months of this fiscal year compared to the same period last year.
In this July 12 photo, Central American migrants rode a freight train during their journey toward the U.S.-Mexico border in Ixtepec, Mexico. The number of family units and unaccompanied children arrested by Border Patrol in the Rio Grande Valley has doubled in the first nine months of this fiscal year compared to the same period last year. Eduardo Verdugo AP
In this July 12 photo, Central American migrants rode a freight train during their journey toward the U.S.-Mexico border in Ixtepec, Mexico. The number of family units and unaccompanied children arrested by Border Patrol in the Rio Grande Valley has doubled in the first nine months of this fiscal year compared to the same period last year. Eduardo Verdugo AP

Texas Gov. Rick Perry to send up to 1,000 guard troops to border

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