Desert Museum & The "Boneyard"

The Arizona-Sonora Desert Museum is a "must see" while you are in the Tucson area.  Be sure to catch the Raptor Live Flight show at 10:00.  They have birds of prey fly literally inches from your head (I dare you not to duck).

The "Boneyard" is actually the Aerospace Maintenance and Regeneration Group (AMARG) at Davis-Monthan Air Force Base where the military currently has ~4,000 aircraft mothballed.  The only way to tour the base is via a bus from the Pima Air & Space Museum.