EXCESSESCan we ever achieve safety by continually banning more and more carry-on items on aircraft?http://www.washingtonpost.com/wp-dyn/content/article/2006/08/10/AR2006081001312.html[Eugene Robinson] Shoe bombs didn't work, and now we shuffle through the metal detectors in our socks. Liquid explosives didn't work, and now we will fly with unbrushed teeth. We can be sure that somewhere in some