FILE PHOTO: A member of a ground crew walks past American Airlines planes parked at the gate during the coronavirus disease (COVID-19) outbreak at Ronald Reagan National Airport in Washington, U.S., April 5, 2020.      REUTERS/Joshua Roberts -/File Photo
Passengers with American Airlines will not be allowed to wear face coverings with exhaust valves or vents starting from August 19. Reuters

American Airlines bans face masks with vents or valves