“I don’t know of any airport or airline that checks passports for incoming passengers on a flight that originated in the U.S.”
Yes, that’s why you refuse entry into the USA.
I get hassled at the border all the time about my passport, and I carry a USA and an Israeli passport.
I would appear to me that there were two opportunities to prevent the infected person from coming to Dallas: when he tried to board in Brussels and when he tried to deplane in DC. I can’t imagine anyone in DC trying to keep a Black passenger from getting off a plane, regardless of where he was from. Not sure what kind of an agreement we have with countries like Brussels which would prevent him from even leaving there.
Seems like it would also be a good idea to revoke the Visas of anyone coming from an infected country although we already have a country full of people with invalid visas. This approach would be valid on paper and in the press, but wouldn’t be enforced. I just think no one of influence and authority in DC cares who comes into the U.S., what they are bringing and why they want to come.
Maybe if enough people who do care quit flying and the airlines suffer financially, one of them will establish some policies that reduce the potential risk. But then we still have the southern border to worry about and we know the feds will take no action there.