Historical film on the <a href="https://en.wikipedia.org/wiki/NASA" class="extiw" title="w:NASA">National Aeronautics and Space Administration's</a> (NASA) <a href="https://en.wikipedia.org/wiki/Lockheed_YF-12" class="extiw" title="w:Lockheed YF-12">Lockheed YF-12</a>
NASA and <a href="https://en.wikipedia.org/wiki/United_States_Air_Force" class="extiw" title="w:United States Air Force">U.S. Air Force</a>
Title "The Lockheed YF-12," courtesy of <a rel="nofollow" class="external text" href="https://www.youtube.com/user/NasaCRgis/featured?disable_polymer=1">NASA Langley CRGIS YouTube channel</a> at <a rel="nofollow" class="external free" href="https://www.youtube.com/watch?v=Z1FLEbAbl4Q">https://www.youtube.com/watch?v=Z1FLEbAbl4Q</a>