In this Tuesday, March 28, 2017 photo, U.S. Border Patrol agents carry bales of marijuana they found along the highway near Ryan, Texas, about 20 miles from the U.S.-Mexico border. One agent said, "They (the smugglers) just leave it and come back another day. It's going to be sad when they come back for it." Drug interdiction is a core mission for the Border Patrol. (AP Photo/Rodrigo Abd)