The <a href="https://en.wikipedia.org/wiki/September_11_attacks" id="mwAcQ" rel="mw:WikiLink" title="September 11 attacks">September 11 attacks</a>, a series of coordinated terrorist attacks killing 2,977 people using four aircraft hijacked by 19 members of <a href="https://en.wikipedia.org/wiki/Al-Qaeda" id="mwAcU" rel="mw:WikiLink" title="Al-Qaeda">al-Qaeda</a>. Two aircraft crash into the <a href="https://en.wikipedia.org/wiki/World_Trade_Center_(1973–2001)" id="mwAcY" rel="mw:WikiLink" title="World Trade Center (1973–2001)">World Trade Center</a> in New York City, a third crashes into <a href="https://en.wikipedia.org/wiki/The_Pentagon" id="mwAcc" rel="mw:WikiLink" title="The Pentagon">The Pentagon</a> in <a href="https://en.wikipedia.org/wiki/Arlington_County,_Virginia" id="mwAcg" rel="mw:WikiLink" title="Arlington County, Virginia">Arlington County, Virginia</a>, and a fourth into a field near <a href="https://en.wikipedia.org/wiki/Shanksville,_Pennsylvania" id="mwAck" rel="mw:WikiLink" title="Shanksville, Pennsylvania">Shanksville, Pennsylvania</a>.<sup about="#mwt116" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-20"}}' id="cite_ref-20" rel="dc:references" typeof="mw:Extension/ref"><a href="./September_11#cite_note-20" id="mwAco" style="counter-reset: mw-Ref 20;"><span class="mw-reflink-text" id="mwAcs">[20]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-20"><cite about="#mwt113" class="citation news cs1" id="mwCIw"><a class="external text" href="https://www.cbc.ca/news/world/bin-laden-claims-responsibility-for-9-11-1.513654" id="mwCI0" rel="mw:ExtLink nofollow">"Bin Laden claims responsibility for 9/11"</a>. CBC News. 29 October 2004<span class="reference-accessdate" id="mwCI4">. Retrieved <span class="nowrap" id="mwCI8">11 September</span> 2019</span>. <q id="mwCJA">al-Qaeda's suicide airplane attacks on Sept. 11, 2001.</q></cite><span about="#mwt113" class="Z3988" id="mwCJE" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.atitle=Bin+Laden+claims+responsibility+for+9%2F11&amp;rft.date=2004-10-29&amp;rft_id=https%3A%2F%2Fwww.cbc.ca%2Fnews%2Fworld%2Fbin-laden-claims-responsibility-for-9-11-1.513654&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ASeptember+11"></span></span>