Ragtopjohnny, same again. yes, they are copyrighted. everything unless specifically released into the Public Domain is copyrighted. and that is everything.

unless you can find a release or it is officially moved to the PD (many things are every year by law as they move outside of the copyright period) assume it is still in copyright.

Airport security is a burden we must all shoulder. Do your part, and please grope yourself in advance.