Originally Posted by
DevilDog438
I wear my USMC ballcap all the time when traveling, have never been requested to remove it.
Guess you've been lucky, and I have not. No matter whether it's a ball cap or a fedora, anytime I've tried to go through the WTMD with one on (and a lot of time just when approaching the x-ray to deposit my bins), a TSO has said, "Your hat, too."