mexico. little chain link fences like this. i'm sitting in mexico right now. it takes very little ingenuity to go under the barbed wire and i'm in the united states. free to go. the new border fences are white elephants according to this arizona congressman who says if you have a 20-foot fence people will just get a 21-foot ladder. >> i think the wall took $2.5 billion that could have been used technologically, could have been used for higher security at ports of entry, used for personnel, and diverted it. >> reporter: why isn't there more wall? you might be surprised to learn there was never supposed to be more wall under the $2.5 billion plan. the border patrol, topography, sensors in virtual fences were supposed to provide additional protection. in some cases it works and many others it doesn't. another arizona sheriff says drug traffickers have abundant incentive to beat the system. >> they have a product and they're going to get that product to the market. >> reporter: this past may one