This week, the CDC has lifted the mask mandate on planes. Monday, U.S. district judge Kathryn Kimball Mizelle struck down a center for disease control and prevention saying that they failed to justify its decision and did not follow proper rulemaking procedure that left it fatally flawed. Many airlines, international and domestic, weighed in on whether or not they’ll continue mask requirements for passengers and planes. So far U.S airlines that are not requiring masks are the following: American Airlines, Alaska Airlines, Delta, Frontier, Hawaiian, Southwest, Spirit, JetBlue, United, Norwegian, and easyJet. According to a statement released Tuesday from the Chicago Department of Aviation, which administers all aspects of Chicago O’Hare and midway International Airports, masks will no longer be required at both airports, effective immediately. “In order to align with recent changes in state and federal guidelines, the Chicago department of Aviation will no longer require masks at O’Hare and Midway international airports,” officials said. Illinois is currently under an executive order set to expire April 30 that does require masks in some public places like healthcare settings.