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What is allowed and what you can carry are two different things. My DW and I traveled to Alaska and back this summer using two airlines, four airports and through 2 countries. My carry on had a DR PSK with original contents, ham radio, AMK FAK, batteries, headphones, couple of MP3 players, wires, antennas, cameras, etc. Never did anyone give it a second look. My wife's purse with a metal aerosal container caused panic in the TSA workers. Go figure.

I did attach my pocket knife to a chain and dropped it through the handle opening of my checked bag so I could easily retrieve to cut the zip ties with which I secured all the luggage.