Harvey Allen's
...that NASA engineer Harvey Allen's "Blunt Body Theory" made possible the design of heat shields that protected the Mercury, Gemini and Apollo astronauts?
...that <a href="./NASA" id="mwAjQ" rel="mw:WikiLink" title="NASA">NASA</a> engineer <b id="mwAjU"><a href="./Harry_Julian_Allen" id="mwAjY" rel="mw:WikiLink" title="Harry Julian Allen">Harvey Allen</a>'s</b> "Blunt Body Theory" made possible the design of <a class="mw-redirect" href="./Atmospheric_reentry" id="mwAjc" rel="mw:WikiLink" title="Atmospheric reentry">heat shields</a> that protected the <a href="./Project_Mercury" id="mwAjg" rel="mw:WikiLink" title="Project Mercury">Mercury</a>, <a href="./Project_Gemini" id="mwAjk" rel="mw:WikiLink" title="Project Gemini">Gemini</a> and <a class="mw-redirect" href="./Project_Apollo" id="mwAjo" rel="mw:WikiLink" title="Project Apollo">Apollo</a> astronauts?