Originally Posted by Citabria
I've seen the same thing happen (multiple times, by accident) with pocket knives. Once they re-screened the bag in question and didn't find it. The traveller (not me) noticed the pocket knife when unpacking at their destination.
I know I've mentioned this anecdote before, but it bears mentioning again. A friend of mine flew ROA-CLT-AHN, then AHN-CLT-MEM, and MEM-ATL-EWR. He had about a 5" fixed-blade knife in his laptop bag in one of its many pockets.
Three trips through the TSA checkpoints, PLUS two hand inspections of his bag at the gate, PLUS a random hand-inspection at the gate, failed to find this knife. He discovered it when unpacking in NJ!!!