AA.Fence.Gulch.DB.6/3/98.Tijuana. –– Looking north from Tijuana, night falls over the U.S./Mexico bo

AA.Fence.Gulch.DB.6/3/98.Tijuana. –– Looking north from Tijuana, night falls over the U.S./Mexico border and lights of San Diego shine in the distance. In the foreground, high powered security beacons illuminate a lone Border Patrol vehicle parked in "Smuggler's Gulch" just north of the fence. The U.S. Army Corps of Engineers wants to put a double fence and access road through this canyon. Environmental agencies are alarmed at the potential negative impact on the Tijuana Slough National Wildlife Refuge in the middleground. (Photo by Don Bartletti/Los Angeles Times via Getty Images)