Violence broke out on an Allegiant flight, waiting to take off from Mesa-Phoenix to Provo, UT, because a passenger was wearing a face shield instead of a mask.
It started with argument between the man in the face shield and an airline attendant. An NBC News report isn't clear about who threw the first punch, but only the man with the face shield was forced off the plane.
Allegiant Air policy allows face shields, but still requires a mask be worn with them.
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