Mask flouting no joke at 30,000 feet, aviation industry says American Airlines pilot Dennis Tajer wears a mask as required by a federal rule instituted Jan. 21. Courtesy of Dennis Tajer Masks are required in O'Hare International Airport and on commercial flights because of the COVID-19 pandemic, but a small number of passengers are refusing to comply. Associated Press Air travel is up after the COVID-19 pandemic decimated the industry in 2020, but with more passengers comes an increase in people who refuse to wear masks on board. Associated Press Updated 5/11/2021 10:...