U.S. Agents Take Undocumented Immigrants Into Custody Near Tex-Mex Border

MISSION, TX - JULY 25: Pilots from the U.S. Office of Air and Marine patrol over the Rio Grande River on July 25, 2014 near Mission, Texas. Tens of thousands of families and unaccompanied minors have crossed illegally into the United States this year, causing a humanitarian crisis on the U.S.-Mexico border. Texas' Rio Grande Valley has become the epicenter of the latest immigrant crisis, as more Central Americans have crossed illegally from Mexico into that sector than any other stretch of the America's 1,933 mile border with Mexico. (Photo by John Moore/Getty Images)