Smugglers have dug so many tunnels under that thing the Israelis cannot keep up with them.
What in God's name possesses you to think that the US is going to do any better?
It would pay you to visit the Border Patrol site and see whats really going on from those who Patrol it...and report the facts.
A fence is definately in order....and the border closed to clean up the mess there. No question about it.