US Border Agents Pursue Undocumented Immigrants And Smugglers In Texas' Rio Grande Valley

U.S. Customs and Border Protection (CBP) agents shoot during a a firearms qualification test at a shooting range on February 22, 2018 in Hidalgo, Texas. CBP agents must complete firearms qualification four times per year. The agents work in the Rio Grande sector of South Texas, which has the most illegal traffic of undocumented immigrants and drug trafficking of the entire U.S.-Mexico border. (Footage by John Moore/Getty Images)