I was talking to my brother today about illegal immigration and he made a pretty funny comment. He's a little soft on attrition through enforcement, but he did say that the U.S. should build the double layer fence and install a well guarded revolving door somewhere along the line. Every time a criminal illegal invader gets busted for a crime, he/she must be deported through the revolving door and would then be exchanged for another immigrant on the other side of the fence. Can you imagine how long the line would be?