Reminds me of when I flew from Southampton to Paris a few months ago... I unfortunately ripped a hole in the crotch of my jeans and asked the assistant in WH Smiths if they had a travel sewing kit, knowing full well it was unlikely. She told me that they did not, however the airside store may do.
So after clearing security (the usual belt off, laptop out, detector alarm then a frisk), I find the Smiths and ask the guy in the store. Right away he started talking with a raised voice at me "Of course we don't, needles are banned and you aren't allowed to carry them!". This amused my wife and I and we tried to make a joke out of the silly regulations today.
Bad move, the assistant almost shouted at us "It's not silly, you know that terrorists used needles to bomb the WTC on 9/11???"
At that point we just walked away, still with a hole in my jeans but amused with the image of terrorists holding up an aircraft with a sewing needle.
(And yes, I know that he said 'bombed', 'not hijacked aircraft'.
)