D.J. Diamond: I think you're correct. I wouldn't be surprised to see the U.S. move to a preauthorized entry system for all non-U.S. citizens who want to enter its territory, much as is used now by Australia. This would cut down on the uncertainty faced by many who don't want to deal with uncertainty of the current system, whereby overzealous border agents dictate who can and can't enter the U.S. And it would eliminate the issue of discriminatory edicts as all foreigners would be subjected to the same system.