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<http://schema.org/description>
"The U-2 is a spy plane, easily recognizable from its gliderlike shape and stealthy black color scheme. The Air Force commissioned it from the Lockheed Corporation in the 1950s as a reconnaissance aircraft that could fly above 70,000 feet—an altitude then presumed to be beyond the reach of Soviet surface-to-air missiles. Today"
<https://airlive.net/military/2020/06/21/the-u-s-air-force-is-investing-more-than-50-million-to-keep-its-u-2-flying-indefinitely/>