First I'd seen that usage as well. It would seem odd for the military (or at least the USAF) to use a different term since it is part of history now.
Question for y'all: In the "Southeast Asia War" section there is a helicopter (suspended) with twin rotors marked "US Air Force" and "Rescue". It can be seen from the marks 051 and 052. Shaped like a box with a rounded front end and then twin booms off the back supporting a horizontal tail surface....even has the exhaust ported way out past this tail surface. What is this?
I think I have an older helicopter reference from a second hand book store i'll check; but I thought someone from here may know right off. Its an odd looking bird to be sure.
Thanks
Derek