Basically what 53Guy posted but we have been pulling a few F-4's and F-111 out of the bone yard and bringing them back in to service for target practice.. They are turned full Remote controled and we go out and blow them up in combat.. We also strip them down to there shells and sell them to other Countries, they have to use there own equipment and engines.. They are also sold to Musuems, and also placed on mounts for base monuments..
About 95% are FMC (Fully Mission Capable) but they are Pickled (Moth Balled) just incase something would happen.. Other times parts are Cannobolized to help save cost on parts and to reuse the airframes to keep the military costs down...
Case in point 3 years ago we had an Airshow here at Langley AFB and this Retired General, that owned an F-4 had it here for show... A friend and I were walking around and stopped to look at the F-4, My friend used to work on these things and he had noted that he saw a broken item in the #2 engine augmentor, some how this engine never had to mod that replaced this item that was known to break, and can cause the engine to self destuct over time.. Anyways after notifing the General we started thinking, you cant get this part anymore... We rememberd that there is a small outdoor aircraft Museum off base, (pickles on a stick) so we grabbed a few tools and drove out there.. Needless to say this engine had the mod done and we removed the item without anyone knowing... We got taken care of and so did the retired Gen.. We didnt get any awards or anything only because we technicaly stole the item from a museum and the higher up officials felt that we shouldnt make this known to anyone else