The first test flight of the <a href="https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird" id="mwAQw" rel="mw:WikiLink" title="Lockheed SR-71 Blackbird">SR-71</a> (Blackbird) takes place at <a href="https://en.wikipedia.org/wiki/United_States_Air_Force_Plant_42" id="mwAQ0" rel="mw:WikiLink" title="United States Air Force Plant 42">Air Force Plant 42</a> in <a href="https://en.wikipedia.org/wiki/Palmdale,_California" id="mwAQ4" rel="mw:WikiLink" title="Palmdale, California">Palmdale, California</a>, United States.