Yes, a fence really keeps them out...
Drug Smugglers Tunnel Into Arizona Parking Spaces
http://abcnews.go.com/Blotter/drug-smugglers-tunnel-arizona-parking-spaces/story?id=14722556
“Drug smugglers are endlessly creative when it comes to inventing ways to move marijuana, cocaine and other contraband from Mexico into the United States.
In the latest innovation uncovered by law enforcement, smugglers in the border town of Nogales, Arizona were bringing drugs into the U.S. for the cost of a quarter.
The parking meters on International Street, which hugs the border fence in Nogales, cost 25 cents. Smugglers in Mexico tunneled under the fence and under the metered parking spaces, and then carefully cut neat rectangles out of the pavement. Their confederates on the U.S. side would park false-bottomed vehicles in the spaces above the holes, feed the meters, and then wait while the underground smugglers stuffed their cars full of drugs from below.”
Perry is right — he wants boots on the ground and surveillance. Fence is useless.
“Drug Smugglers Tunnel Into Arizona Parking Spaces”
Nice try. No fence means the illegals who don’t know how to do tunnels just walk right in. Fact is they have it much easier without a Border fence.