Correction. The air force is committed to putting all 49 surviving C-5B's and 2 C-5C's through the RERP program. The question is whether to put the the 60 C-5A's that are still being operated in the RERP program. A further complication is that all surviving C-5A's were rewinged in the 1980s. A few years ago the first eleven C-5A's and three other C-5A's were sent to the boneyard to supply spares for the remaining fleet.
The latest I heard is that Gen Mosely wants to retire all the C-5A models and not screw with the Avionics Mod Program (AMP) or the RERP program - but that means more C-17s.
A billion here, a billion there, and pretty soon you are talking real money.