Could someone help me? I read in the August issue of Airliner World that the US Air Force is operating one 747-400 Combi. Is that true? The only 747s I can think they operate are the E-4B and Air Force One. Also, what varient is AF One? Thanks for any help!
The one you might be referring to, Dash 80, is probably the last one I mentioned, the Airborne Laser. It´s not an M version, rather an F, but apart from that, it fits the description you cite (i.e. USAF´s only -400).