Dogs generally like to see where they are, feel the wind, and have a place to lay down.
So if it was an adequate dog carrier, properly ventilated and restrained and if he ensured there was sufficent water and breaks for the dog relieve itself...then I have no problem at all with this.
My guess is none of the aspects of this story dealing with these matters have been examined...or if they have, they have not been reported, and if not, probably because the dog was just fine on the family vacation and they simply want to gen up the hype.
I still couldn’t do that to an animal. Didn’t he drive a station wagon? (asking..thinking so..). I’d rather tie the luggage to the roof and keep the pet in the auto.