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Gov. Rick Perry, center, speaks during a news conference in the Governor's press room, Monday, July 21, 2014, in Austin, Texas. Gov. Perry announced he is deploying up to 1,000 National Guard troops over the next month to the Texas-Mexico border to combat criminals that Republican state leaders say are exploiting a surge of children and families entering the U.S. illegally.  (AP Photo/Eric Gay/AP Photo)
Gov. Rick Perry, center, speaks during a news conference in the Governor's press room, Monday, July 21, 2014, in Austin, Texas. Gov. Perry announced he is deploying up to 1,000 National Guard troops over the next month to the Texas-Mexico border to combat criminals that Republican state leaders say are exploiting a surge of children and families entering the U.S. illegally.  (AP Photo/Eric Gay/AP Photo)

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    The link between immigration & terrorism

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The link between immigration & terrorism

Texas Gov. Rick Perry says that some illegal immigrants are from countries with substantial terrorist ties.

The link between immigration & terrorism

Texas Gov. Rick Perry says that some illegal immigrants are from countries with substantial terrorist ties.