MCALLEN, TX - MAY 21: The Anzalduas Dam stretches across the Rio Grande at the U.S.-Mexico border on May 21, 2013 near McAllen, Texas. The Rio Grande Valley area has become the busiest sector for ... more 
MCALLEN, TX - MAY 21: The Anzalduas Dam stretches across the Rio Grande at the U.S.-Mexico border on May 21, 2013 near McAllen, Texas. The Rio Grande Valley area has become the busiest sector for illegal immigration on the entire U.S.-Mexico border with more than a 50 percent increase in the last year. (Photo by John Moore/Getty Images) less 
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Getty Images | Photo By John Moore / Getty Images
Wed, May 22, 2013 9:07 AM EDT