Standing in the security line at the OKC airport the other day, I handed my driver's license and airline tickets to a TSA employee. He scanned it and then looked up. "Hey, I know you," he said, "you work at the Severe Storms Lab and are friends with J. L.". And yes, I knew him as a photographer and storm chaser, but didn't know that his day job was is with the TSA. I'd met him a couple of times at parties at the homes of friends who also chase.
So now I have another point of reference. It's a really, really small place when I now know socially at least two people who work at the Oklahoma City airport (the other person works at the check-in desk for an airline).