Lockheed Martin SR-72
... that the recently revealed Lockheed Martin SR-72, the successor to the SR-71, is designed to fly at six times the speed of sound?
... that the recently revealed <b id="mwDdY"><a href="./Lockheed_Martin_SR-72" id="mwDdc" rel="mw:WikiLink" title="Lockheed Martin SR-72">Lockheed Martin SR-72</a></b>, the successor to the <a href="./Lockheed_SR-71_Blackbird" id="mwDdg" rel="mw:WikiLink" title="Lockheed SR-71 Blackbird">SR-71</a>, is designed to fly at six times the <a href="./Speed_of_sound" id="mwDdk" rel="mw:WikiLink" title="Speed of sound">speed of sound</a>?