The Google Maps view of Davis Monthan AFB is fascinating:
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Davis Monthan is home to the 309th Aerospace Maintenance and Regeneration Group, basically the boneyard for obsolete US aircraft. Around 4400 old military planes are parked in the desert. The low humidity helps preserve the aircraft, and the hard soil means that it isn't necessary to pave their parking areas. Google lets you zoom in enough to identify individual aircraft, and in some cases see how they have been stripped for parts. I'm not an aircraft expert, but I'm pretty sure some of the ones I can ID are from the 1950's.