CBS News correspondent David Begnaud rode along with a group of Border Patrol agents in Texas' Rio Grande Valley sector, one of the busiest crossing areas for undocumented immigrants on the U.S.-Mexico border. One of the agents told Begnaud that they feel they are being treated unfairly in the U.S.'s ongoing national conversation about immigration, saying "we all have a heart, but at the end of the day we have to do our job."
