At philly airport they take the case in back out of site and then get keys on trip my son said something about it and was told thats how its done there even though tsa rules say different just goes to show you there rules dint really matterThe TSA rules state that the firearm case should be locked and the firearm owner shall retain the key (or combination) and open the case for inspection upon request but not surrender the key. I have traveled on many domestic and international airlines and my case is locked with heavy duty non-TSA locks. I have been requested by check in staff and TSA to open the case on many occasions but rarely asked for the key. When asked I respond that I will open the case but TSA regulations forbid me to surrender the key and have never had a challenge ir an unpleasant incident as a result. I find it best to have a keyed-alike lock in every hole.