The two C-5C's are just old A-models that had a few mod's done to them. One of them was because of a ground fire that gutted the troop comp., and unsure why they picked the other one. Their tail #'s are 68-213, and 68-216.They are both assigned to the 60th, at Travis AFB, CA. They have reengineered the aft cargo pressure door, and side cargo doors to allow several types of large cargo items to be loaded. The most notable of which is NASA stuff, hence the unofficial nickname of "NASA birds".
At Pope, where not happy, until you're not happy!