"The Bastard". Only SR-71C. No article number as it has been built after the production was closed, from the aft parts of the crashed YF-12 #934 and from the front parts of a previous static test article of Lockheed, to replace a recently lost SR-71B. Was a bit crooked and flew sideways. Never really flew up to the SR-71B standards. Was retired on 11 April 19976 after 556FH