Saturn V test vehicle
... that NASA engineers shook a Saturn V test vehicle for over 400 hours to ensure it would withstand the rigors of launch?
... that NASA engineers shook a <b id="mwB9g"><a class="mw-redirect" href="./SA-500D" id="mwB9k" rel="mw:WikiLink" title="SA-500D">Saturn<span id="mwB9o" typeof="mw:Entity"> </span>V test vehicle</a></b> <i id="mwB9s">(S-IC stage pictured)</i> for over 400 hours to ensure it would withstand the rigors of launch?