And the C-5 fleet is going down in number, even with the C-5M upgrade. Only the 50 or so B's are going through the "M" program (plus one test A and the two C's), so dozens of A's have already gone to the boneyard, and several have already been cut up. So yes improved reliability and dispatch with the M, but the Galaxy fleet will be down to around 52 aircraft quite soon from 131 built. Sadly the marvelous "electric" sounding engines are about gone.