I did a search and didn't come up with a solid result......

Just went through the extra screening here in TLH on my way to MIA this morning. I make this very same trip on average twice monthly. Today, while in the extra screening (which I'm picked for every couple of months), they asked the typical questions after the wanding and pat-down, but additionally, they removed all the contents from my wallet and looked at each item (credit cards, frequent traveler cards, health insurance card, etc.)

My question is a simple one.....is this common? I've never had someone rifle through my wallet like that, or have I just been really lucky?