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The Blackbird Had a Drone Sidekick
"Enter the D-21. The drone looked like a wing carved off the body of an A-12 and was supposed to work as a more or less a stripped-down, unmanned version of its manned cousin.

Lockheed converted two A-12 aircraft, renamed M-21, into motherships, adding a second seat for a launch control officer and modifying the aircraft to carry the drone on its back up to a launch point."

Posted by: Hupineger Glomomp1540 2015-02-09
http://www.rantburg.com/poparticle.php?ID=410311