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Le M-21 de Lockheed Blackbird a effectué une collecte du renseignement drone, exposées au Musée de l'aviation, Boeing Field, Washington Photo Stock - Alamy
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Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned
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Flying Atop SR-71 Blackbird, Meet US' Top Secret Spy Drone That No One Knew Existed Until It Was Abandoned
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