'C' the Galaxy
The Lockheed Martin Skunk Works® facility in Palmdale, Calif., performed maintenance on one of just two C-5C Galaxy aircraft in the world in May 2013. The C-5C features more cargo capacity than A & and B models due to removal of the entire passenger compartment. Each of the two C-5C aircraft is assigned to Travis Air Force Base, Calif., and will eventually be modernized to become the C-5M Super Galaxy.
Source : Lockheed Martin Corporation (NYSE: LMT)