I think most of us know about PreCheck now, but in case you don't, here is what it's all about:
TSA Pre✓® is an expedited screening program that enables identified low-risk air travelers to enjoy a smart and more efficient screening experience. For TSA Pre✓® travelers, there is no need to remove shoes, 3-1-1 liquids, laptops, light outerwear, or belts. Today, TSA Pre✓® has more than 450 lanes at 200+ airports, including CMI.
Image from Fly Champaign-Urbana Facebook page.