Agents try to battle drive-through smugglers BY LOUIE VILLALOBOS, Staff Writer Jul 21, 2003 When the El Centro sector of the U.S. Border Patrol put barriers along Interstate 8 to stop vehicles from illegally entering the United States near the Imperial Sand Dunes recreation area, the smugglers moved part of their operation and the dangers it brings to Yuma, agents said. Large concrete blocks prevent vehicles from Los Algodones, Baja Calif., from entering the United States. Photo by Alfred J. Hernandez Now, after the Yuma sector put up their own barriers near Andrade, Calif., the smugglers have alternated between the...