Prior to 9/11 you could not take a knife on board an airplane that had a blade that was longer than three inches.
Then, for a while, NO knives were allowed.
NOW, you can take a knife that has a blade that is shorter than FOUR inches!
Does this make ANY sense?!
The 9/11 hijackers used retractable-blade box-cutters whose breakaway blades could be considered as being under TWO inches long under current TSA regulations!
I'm calling SHENNANIGANS!! Everyone go home and get your brooms (subtle South Park reference for those not in the loop)!