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

MISSION, TX - JULY 24: Unaccompanied minors from El Salvador await transport to a U.S. Border Patrol processing center after they crossed the Rio Grande from Mexico into the United States on July 24, 2014 in Mission, Texas. Tens of thousands of undocumented immigrants, many of them unaccompanied minors, have crossed illegally into the United States this year and presented themselves to federal agents, causing a humanitarian crisis on the U.S.-Mexico border. (Photo by John Moore/Getty Images)