I don't need to underscore how appalling that man and his wife's behavior was — nor how gobsmacking awful it is that the other passengers lowered their masks AFTER that incident. My son is an airline pilot, and I shudder to think of what he and especially his flight attendant crews are exposed to up there. I am all for a vaccine passport required to travel by air — or train, or cruise ship, or any conveyance in which people are going to be enclosed together for a long period. Don't choose to be vaccinated? Well, fine. But choices have consequences.