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KDMA is a major boneyard of old aircraft
https://en.wikipedia.org/wiki/Davis%E2%80%93Monthan_Air_Force_Base

As the main location for the 309 AMARG, Davis–Monthan AFB is the sole aircraft boneyard for excess military and U.S. government aircraft and other aerospace vehicles such as ballistic missiles. Tucson's dry climate and alkali soil made it an ideal location for aircraft storage and preservation.

Convair B-36 Peacemaker 1946 bomber, 384 built
https://en.wikipedia.org/wiki/Convair_B-36_Peacemaker