(relatively low stakes, as in like not 9/11 or JFK level)
Mine: plastic straw (and now plastic cutlery) ban initiatives are directly funded by petrochemical companies. Plastic straws are one of the most common and useful types of disposable plastic an average American encounters every day, so banning them causes people a huge inconvenience and tarnishes the idea of other green initiatives (that might have actual teeth) as more nanny state "not allowed to have this"-ery (also has the side effect of making gullible libs think they're actually doing something to help the planet by using a reusable straw while they get their plastic container of meat products)
So, I don't have the book on me because I lent it to someone right before everything fun got cancelled, but I have a book called Torture Taxi about the CIAs rendition flights, and I don't recall there being anything about DIA in there, but it's a great and quick read related to airport fuckery, I'd highly recommend looking it up, it goes into great detail about the CIA used non-existent companies as a front for these privately owned jets, because the CIA A isn't actually a military organization, they're technically "civilian." There's a lot of military activity in Colorado, with the Air Force Base in Colorado Springs (they've had high school marching band state championships there before, fun fact), Rocky Mountain Aresenal, and My Cheyenne. I wouldn't be at all surprised if DIA has some clandestine connection to all that. I also wouldn't be surprised if it wasn't, because I think DIA is really just a good excuse to develop all that land into more endless suburb.