A Texas Department of Safety Trooper patrols on the Rio Grande along the U.S.-Mexico border, Thursday, July 24, 2014, in Mission, Texas.
A Texas Department of Safety Trooper patrols on the Rio Grande along the U.S.-Mexico border, Thursday, July 24, 2014, in Mission, Texas. Eric Gay AP
A Texas Department of Safety Trooper patrols on the Rio Grande along the U.S.-Mexico border, Thursday, July 24, 2014, in Mission, Texas. Eric Gay AP