C-5A Galaxy from Atlus AFB. According to C-5 Galaxy In Action (comments below): "AF70-0458 is a C-5A, the 72nd out of 81 built. It first flew circa 1972."
Photograph taken at AMARG, the 309th Aerospace Maintenance and Regeneration Group at Davis-Monthan Air Force Base in Tucson, AZ by Matthew Christopher of Abandoned America.