![Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned](https://eurasiantimes.com/wp-content/uploads/2022/06/US-Supersonic-Ramjet-Powered-Spy-Drone-D-21.jpg)
Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned
![YF-12, 3 SR-71 wit the 3rd SR carring a D-21 high speed drone. | Aircraft, Spy plane, Sr 71 blackbird YF-12, 3 SR-71 wit the 3rd SR carring a D-21 high speed drone. | Aircraft, Spy plane, Sr 71 blackbird](https://i.pinimg.com/originals/ce/96/4b/ce964b06ca68d834aaee3c067e4e1fa9.jpg)
YF-12, 3 SR-71 wit the 3rd SR carring a D-21 high speed drone. | Aircraft, Spy plane, Sr 71 blackbird
![File:Lockheed M-21 mothership & D-21 drone, Seattle Museum Of Flight, Washington (1).jpg - Wikimedia Commons File:Lockheed M-21 mothership & D-21 drone, Seattle Museum Of Flight, Washington (1).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/6/6d/Lockheed_M-21_mothership_%26_D-21_drone%2C_Seattle_Museum_Of_Flight%2C_Washington_%281%29.jpg)
File:Lockheed M-21 mothership & D-21 drone, Seattle Museum Of Flight, Washington (1).jpg - Wikimedia Commons
![Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned](https://eurasiantimes.com/wp-content/uploads/2022/03/Sr71_Blackbird-e1655034642232.jpg)