My brother who lives in Eagle, Idaho and I recently visited relatives for a family reunion in Carrollton, Kentucky and since he's just started to turn, I took him some gifts. I had an extra Jacob's chuck and some wine stopper kits for him, along with the drill bit and screw to turn on his new Jet Mini. After the reunion was over, it seems when he went through the screen at the Cincy airport, they questioned what all of the items were. The guy at the screen told him they couldn't let any of it go on the plane since he wasn't sure what the metal stoppers were, at which point my brother asked to see the supervisor.
The supervisor showed up, took one look and said "hey, how long have you been turning? I've made a bunch of those stoppers and pens myself". They got to talking and the supervisor was going to let my brother take everything on, but the screener asked "what about this chuck key? He has the drill bit, the holder and this (holding up the chuck key) and could use it as a weapon if he puts the bit in the other thing".
The supervisor asked my brother if the drill bit was worth leaving the line after waiting 35 minutes for their turn to be screened and mailing it to himself, and my brother told him "no". So in the end, my brother was allowed on the plane with two lighters, a bottle of Myland's friction polish, the drill chuck, chuck screw, metal stoppers and his "leatherman" tool in his carry-on ... but no drill bit. Go figure. Thank goodness we have these people protecting the skies as we fly.