I was stuck in Denver last night. All international flights were cancelled because they couldn't communicate pax lists to comply with TSA and customs requirements. They were taking passengers with paper boarding passes on some flights, typically the regioal ops. One major problem was all the monitors were inop, so no one knew where to go. The crew on my flight to Aspen were at the wrong gate waiting for the plane. They seemed to have the flight paperwork.
Then again, my boarding pass for an earlier flight was taken without question even though I missed it on the inbound flight. My bag made it to ASE, which totally surprised me.
It was rather chaotic.