"Frontier Airlines is facing criticism from a top police officer organization and Republican Rep. Doug Collins after they were accused of prohibiting a federal air marshal from boarding a flight in Atlanta due to his face covering, which featured an American flag."
" ... the air marshal was stopped by the Gate Agent and advised that he should wear another mask and was handed a disposable one. The FAM politely put the disposable mask on and then covered that mask with this American Flag mask, NAPO wrote. 'The Gate Agent then told him to remove the American Flag mask or he would not be allowed to board the plane as it would create issues with the other passengers.'
NAPO went on to claim that 'several passengers with Black Lives Matter masks boarded the plane.' "
https://www.foxnews.com/us/frontier-...flag-face-mask