Construction begins on <a href="https://en.wikipedia.org/wiki/The_Pentagon" id="mwASw" rel="mw:WikiLink" title="The Pentagon">The Pentagon</a>.<sup about="#mwt81" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-13"}}' id="cite_ref-13" rel="dc:references" typeof="mw:Extension/ref"><a href="./September_11#cite_note-13" id="mwAS0" style="counter-reset: mw-Ref 13;"><span class="mw-reflink-text" id="mwAS4">[13]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-13"><cite about="#mwt78" class="citation web cs1" id="mwCE0"><a class="external text" href="https://web.archive.org/web/20140819162620/https://pentagontours.osd.mil/facts-construction.jsp" id="mwCE4" rel="mw:ExtLink nofollow">"Facts &amp; Figures: Construction"</a>. <i id="mwCE8">Pentagon Tours</i>. Archived from <a class="external text" href="https://pentagontours.osd.mil/facts-construction.jsp" id="mwCFA" rel="mw:ExtLink nofollow">the original</a> on 19 August 2014.</cite><span about="#mwt78" class="Z3988" id="mwCFE" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Pentagon+Tours&amp;rft.atitle=Facts+%26+Figures%3A+Construction&amp;rft_id=https%3A%2F%2Fpentagontours.osd.mil%2Ffacts-construction.jsp&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ASeptember+11"></span></span>