Support WBURBorder Fence Yields Showdown At Smuggler's GulchPlayDownload AudioJason BeaubienFebruary 06, 2009 ShareThe U.S. Department of Homeland Security is filling in Smuggler's Gulch between San Diego and Tijuana, Mexico, with almost 2 million cubic yards of dirt. The rugged canyon is the site of smuggling of every type of contraband imaginable.