[[Pentagon Memorial]] blev afsluttet og åbnet for offentligheden på syvårsdagen for angrebene, den 11. september [[2008]].<ref>{{cite news |first=Nick |last=Miroff |title=Creating a Place Like No Other |url=http://www.washingtonpost.com/wp-dyn/content/article/2008/09/10/AR2008091000018.html |work=[[The Washington Post]] |publisher=[[The Washington Post Company]] |date=11. september 2008 |access-date=12. september 2008 }}</ref><ref>{{cite news |first=Nick |last=Miroff |title=A Long-Awaited Opening, Bringing Closure to Many |url=http://www.washingtonpost.com/wp-dyn/content/article/2008/09/11/AR2008091100579.html?hpid=topnews |work=The Washington Post |publisher=The Washington Post Company |date=11. september 2008 |access-date=11. september 2008 }}</ref> Pentagon Memorial består af en park med 184 bænke overfor Pentagon.<ref name="dwyer-may2007">{{cite news |last=Dwyer |first=Timothy |url=http://www.washingtonpost.com/wp-dyn/content/article/2007/05/25/AR2007052502284.html |title=Pentagon Memorial Progress Is Step Forward for Families |date=26. maj 2007 |publisher=The Washington Post |access-date=21. maj 2008}}</ref> Da Pentagon var under sin genopførelse i perioden [[2001]]-[[2002]] blev et privatkapel og et indendørs mindesmærke midlertidigt placeret på det sted, hvor Flight 77 ramte bygningen.<ref>{{cite web |url=http://www.defenselink.mil/photos/newsphoto.aspx?newsphotoid=4018 |title=DefenseLINK News Photos – Pentagon's America's Heroes Memorial |publisher=Department of Defense |access-date=24. juli 2007}}</ref>
Historie