Recently I was in St. Louis and had to go through the arch. As you all know if you've been to the arch, you have to go through a security checkpoint where they ask you to take your belt off, dance around, show you're not carrying an ankle holster, etc. I didn't carry my pocketknife in with me because I figured they wouldn't let that go, even though in MO a pocketknife with less than a 4 in. blade is not considered a weapon (best not to argue with the rent-a-cops, right? And I can say that because I am a rent-a-cop :-D ) but would they take a flashlight if I had that on?
That being said, what is a good flashlight for EDC that is not terribly expensive but has good SD capabilities?