SR-71's to my knowledge were "unretired" do to the fact that no plane has been developed to replace them.
I thought thats what the Aurora was for? The USAF made no opposition towards the SR-71's retirement, and congressional attempts to revive the program were discouraged. Never in the history of the USAF had a program been closed without opposition. Aurora is the missing factor to the silent closure of the SR-71 program.
You better tell the air force.
"The U.S. Air Force retired its fleet of SR-71s on January 26, 1990, because of a decreasing defense budget and high costs of operation. The USAF returned the SR-71 to the active Air Force inventory in 1995 and began flying operational missions in January 1997. The aircraft was retired again in 1998." http://www.wpafb.af.mil/museum/research/bombers/b5/b5-68.htm