Two B-52s have returned to service from 309th Aerospace Maintenance and Regeneration Group (AMARG) at Davis-Monthan Air Force Base in Arizona, also known as the "boneyard," where retired or mothballed aircraft are stored.
One bomber, nicknamed "Ghost Rider" returned in 2015, and the other, "Wise Guy," in May.
"Wise Guy," a Stratofortress brought to Barksdale Air Force Bease in Louisiana to be refurbished, had a note scribbled in its cockpit, calling the aircraft, "a cold warrior that stood sentinel over America from the darkest days of the Cold War to the global fight against terror" and instructing the AMARG to "take good care of her … until we need her again."