Pre 9-11, pre TSA I was travelling from Boston to Charlotte, with a stop each way at Dulles. In Boston, I got through security fine. At Dulles, I had to go back through X-Ray...and in my carry on they saw something that looked like a knife. They searched the bag, repeatedly, including the supervisor of the person who saw the knife. They found nothing, and let me through. At the hotel in Charlotte, on unpacking the bag I found my Buck 102, left in there from a canoe trip the week before. I mailed it back home from Charlotte so I wouldn't have to get it through security, though back in those days it probably would have been fine on my belt. Even back then I was glad I didn't get arrested.