SR-71A. Last production aircraft of the Blackbird family, first flew on 25 Sept 1967. Saw operations from Det1 Kadena in 1968 and from Det4 Mildenhall UK in 1986 during Eldorado Canyon operations over Lybia. Handed over to NASA in 1990 after USAF decommissionned SR from Beale. Flew as NASA #844 in the high speed program. Was fitted with the Aerospike engine in piggyback in 1997. Last flown in October 1999, last flight of any Blackbird. 2354FH