Last spring we were at the Post Office Museum in Washington D C . Right next to WUS. Had a couple of hours to kill. When we entered I set off the alarm. I put everything in the tray. Was given everything back , keys ect. However they wanted my small pocket knife. I said I would let them hold it while we were inside. If they would give it back. Otherwise no way do they get it. The knife has been passed down to me from my dad. No problem they said and gave me a check for it. I also keep a Leatherman tool in my carry on , on every trip.