This has to be domestic flights. Don't try to fly INTO the U.S. with ANYTHING pointy especially if you're holding a passport from another country.
I am not a shrinking violet type of person, but I get shaky when I have to face the security when trying to fly into the U.S.
Also calling the airlines is kind of a waste of time... the airlines has NO say in what goes on a flight. Security is for every airline and if you get a a cranky security guard, watch out. I lost on one trip, a metal comb for my hair (It could be untwisted and made into a weapon), nail clippers (mine had a little piece that could swing out and was pointy), and some prescription eyedrops that had the prescription label attached and was 30 mls (100 mls is the cut off for liquids).
OH yes he also told me to take apart everything in my camera bag... and was muttering about taking my extra batteries. Nikon batteries are not your normal AA or AAA batteries. My husband and I carry expensive Nikon equipment when we travel. By this time I had attracted the attention of his supervisor and I was allowed to put everything back in the bag.
It is really a curious phenomenon. All the flights that were downed on 9-11 were domestic flights, but a plump middle-aged white woman trying to travel from Canada to Florida is a threat to homeland security? All it has done is to make me re-think my mid-winter breaks in the U.S.