Useless trivia...
When the shuttle was landing out at Edwards AFB frequently back in the day, NASA wanted to see what they could to eliminate the enroute stops on the way back to the Cape. Our answer (from the tanker guys perspective) well, how about air refueling? The mil version of the 747 has a refueling receptacle, just slap one on the nose of that baby and there ya are! I even vaguely remember that there was some proximity testing to see if it was feasible. Turns out that the orbiter materials are really sensitive to even a little bit of fuel spray that would normally occur, and probably even the exhaust emissions from the tanker engines were bad news.
Second solution, hang an air refueling boom on the 747 and have one of our KC-10's reverse refuel (pump fuel UP through the boom) and that way there would be no spray on the shuttle! I was an obvious volunteer to fly the boom for that mission.
Alas, the ideas got dropped into oblivion, and they still hopscotch across the country.