One interesting thing is rather than stop flights from Wuhan they had inspectors ride on the flights and check the passengers mid flight and then quarantine anyone questionable on arrival.

what's the difference between checking them in mid-air versus at the port of arrival?

I am guessing, but:

1. They can make someone with a temperature wear a mask immediately, reducing transmission to others on the plane, and containing them on arrival.

2. It avoids crowding and possibly cross-contamination on arrival at a testing station.

3. It prevents delays for passengers.

Wouldn't it make more sense to test and ask all passengers to wear masks before they board the plane? By the time they are flying in crowded airplane, it's too late. This approach doesn't seem to make much sense.