The "Bone Yard" is like an auto junk yard. It is where surplus planes are sent when there is
no further need seen to keep them in ready condition. They are then slowly stripped as parts
are need by the our military or other countries.
One other function in the bone yard is to meet peace agreements.
We have a treaty with Russia to destroy part of our nuclear delivery capability every year. Bombers and missiles are chopped up and left scattered to be monitored by satellite for compliance with the treaty. Periodically, a Russian delegation will tour the area to verify that the chopped up planes were fully equipped with engines and electronics. They also compare their satellite pictures with what is on the ground.