TSA has a 60-70% fail rate, I even saw this on a report on MSNBC.
You would be surprised what you can carry on. I flew about 3 flights round trip with a 4" blade/bottle opener combo in the front of my laptop bag. I bought it in vegas and never took it out. I only noticed when I was going through my bag, but it is a 5" by 1/2" steel plate with two folding out objects... not easy to spot.
With all my flying, Ive been asked only once to surrender an item... it was a week old Mack 3 razor I used once. "Watch out air travelers, he could give you a clean shave"
