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IMPERIAL SAND DUNES, CA - SEPTEMBER 28:  The U.S.-Mexico border fence snakes over sand dunes on September 28, 2016 in the Imperial Sand Dunes recreation center, California. Without daily removal of sand, which drifts against the fence, the dunes would cover the fence and undocumented immigrants and smugglers could simply walk over it. The border stretches almost 2,000 miles between Mexico and the United States. Border security and immigration issues have become major issues in the U.S. Presidential campaign.  (Photo by John Moore/Getty Images)
IMPERIAL SAND DUNES, CA - SEPTEMBER 28:  The U.S.-Mexico border fence snakes over sand dunes on September 28, 2016 in the Imperial Sand Dunes recreation center, California. Without daily removal of sand, which drifts against the fence, the dunes would cover the fence and undocumented immigrants and smugglers could simply walk over it. The border stretches almost 2,000 miles between Mexico and the United States. Border security and immigration issues have become major issues in the U.S. Presidential campaign.  (Photo by John Moore/Getty Images)

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Immigration violations: The one thing to know

Have undocumented immigrants committed a crime just by being here? Not necessarily. CNN's Laura Jarrett explains.

Immigration violations: The one thing to know

Have undocumented immigrants committed a crime just by being here? Not necessarily. CNN's Laura Jarrett explains.