I did that once at Midway, but discovered the problem before boarding my flight. Went to TSA, and they returned it to me. I'd suggest you call TSA at your originating airport to ask if they have it. You can ask in person upon your return. The middleseat is right, you actually don't absolutely need it. Advice, take a picture of the front and back of your license with your cell phone. At the very least, the photo will assist with the replacement process at DMV.
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