<a href="https://en.wikipedia.org/wiki/XCOR_Aerospace" id="mwATE" rel="mw:WikiLink" title="XCOR Aerospace">XCOR Aerospace</a> makes the <a href="https://en.wikipedia.org/wiki/Rocket_mail#Reusable_launch_vehicles" id="mwATI" rel="mw:WikiLink" title="Rocket mail">first crewed rocket aircraft delivery of U.S. Mail</a> in <a href="https://en.wikipedia.org/wiki/Kern_County,_California" id="mwATM" rel="mw:WikiLink" title="Kern County, California">Kern County, California</a>.