Actually, I would figure it'd be easier for them to hurt you with a pocket knife than a katana. Airplanes are small spaces, and large swords are unwieldy. Even

Actually, I would figure it'd be easier for them to hurt you with a pocket knife than a katana. Airplanes are small spaces, and large swords are unwieldy. Even samurai used wakizashis indoors more than huge katanas. That said, I want neither in carry-on.