People have done a lot of ridiculous things with the 747, but the
Shuttle Carrier Aircraft (SCA) is probably the coolest variant. It's too bad no one had the space to leave one of the Shuttles (perhaps the Enterprise?) mounted on one of the carriers. Instead of retiring to a nice air conditioned museum they'll be roughing it out in the desert...
It's just impressive getting to be in the vicinity of the two of them.
The Orbiter/SCA combo gets about 125 feet/gallon!
