CNN  —  Deep in one of America’s darkest hours, President George W. Bush warned that while the war on terror was started by others on 9/11, it would end “at an hour of our choosing.” It took nearly a quarter of a century — but soon, one of the last tangible daily legacies of that conflict will disappear. America will extract a small measure of revenge on Osama bin Laden and his al Qaeda acolytes when the final traveler shuffles through airport security in their socks or stockings. We’ve been