September 11 attacks

=== Legal proceedings ===
{{Main|Trials related to the September 11 attacks|United States v. Khalid Sheikh Mohammed}}
As all 19 hijackers died in the attacks, they were never prosecuted. Osama bin Laden was never formally indicted but was after a [[Manhunt for Osama bin Laden|10-year manhunt]] [[Killing of Osama bin Laden|killed]] by U.S. special forces on May 2, 2011 in [[Osama bin Laden's compound in Abbottabad|his compound]] in [[Abbottabad]], Pakistan.{{Efn|President [[Barack Obama]] announced his death on May 1. At the time of the raid, it was early morning of May 2 in Pakistan and late afternoon of May 1 in the U.S.}}<ref>{{cite news |last1=Baker |first1=Peter |last2=Cooper |first2=Helene |date=May 1, 2011 |title=Bin Laden Is Dead, President Obama Says |work=[[The New York Times]] |url=https://www.nytimes.com/2011/05/02/world/asia/osama-bin-laden-is-killed.html |access-date=September 3, 2011}}</ref> The [[United States v. Khalid Sheikh Mohammed|main trial of the attacks]] against Mohammed and his co-conspirators [[Walid bin Attash]], [[Ramzi bin al-Shibh]], [[Ammar al-Baluchi]], and [[Mustafa Ahmad al Hawsawi]] remains unresolved. Khalid Sheikh Mohammed was arrested on March 1, 2003, in [[Rawalpindi]], Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple [[Black site|CIA secret prisons]] and [[Guantanamo Bay detention camp|Guantanamo Bay]], where he was interrogated and tortured with methods including [[waterboarding]].<ref>{{cite news |last1=Shannon |first1=Elaine |last2=Weisskopf |first2=Michael |date=March 24, 2003 |title=Khalid Sheikh Mohammed Names Names |magazine=[[Time (magazine)|Time]] |url=http://content.time.com/time/nation/article/0,8599,436061,00.html |access-date=September 3, 2011}}</ref><ref>{{cite news |last=Nichols |first=Michelle |date=May 8, 2008 |title=US judge orders CIA to turn over 'torture' memo-ACLU |publisher=[[Reuters]] |url=https://www.reuters.com/article/idUSN08420997 |access-date=September 3, 2011}}</ref> In 2003, [[Mustafa al-Hawsawi]] and [[Ammar al-Baluchi|Abd al-Aziz Ali]] were arrested and transferred to US custody. Both would later be accused of providing money and travel assistance to the hijackers.<ref>{{Cite web |last=Rosenberg |first=Carol |date=July 10, 2023 |title=Trial Guide: The Sept. 11 Case at Guantánamo Bay |url=https://www.nytimes.com/article/september-11-trial-guantanamo-bay.html |website=[[The New York Times]]}}</ref> During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.<ref name="aljazeera2007" /><ref>{{cite news |date=March 15, 2007 |title=Key 9/11 suspect 'admits guilt' |publisher=[[BBC News]] |url=http://news.bbc.co.uk/2/hi/americas/6452573.stm |access-date=April 10, 2012}}</ref> In January 2023, the US government opened up about a potential [[Plea bargain|plea deal]],<ref name=":1">{{Cite web |last=Dunleavy |first=Jerry |date=January 9, 2023 |title=9/11 trial delayed again as Biden administration pushes for plea deal with terrorists |url=https://www.washingtonexaminer.com/news/justice/2023-kicks-off-911-gitmo-hearings-delayed-again |access-date=December 20, 2023 |website=Washington Examiner |language=en}}</ref> with Biden giving up on the effort in September that year.<ref>{{Cite web |last1=Nagle |first1=Molly |last2=Schulze |first2=Elizabeth |last3=Winsor |first3=Morgan |title=Biden rejects proposed conditions for plea deal for 9/11 defendants |url=https://abcnews.go.com/Politics/biden-rejects-proposed-conditions-plea-deal-911-defendants/story?id=102989534 |date=September 7, 2023 |access-date=December 20, 2023 |website=[[ABC News]] |language=en}}</ref>

To date, only peripheral persons have thus been convicted for charges in connection with the attacks. These include:

* [[Zacarias Moussaoui]] who was indicted in December 2001 and sentenced to life in prison without the possibility of parole in May 2006 by a U.S. federal jury
* [[Mounir el-Motassadeq|Mounir El Motassadeq]] who was first convicted in February 2003 by a [[Federal Court of Justice]] in [[Germany]] and was deported to [[Morocco]] in October 2018 after serving his sentence<ref>{{Cite web |last=Werkhäuser |first=Nina |title=Germany deports convicted 9/11 accomplice |url=https://www.dw.com/en/germany-deports-convicted-9-11-accomplice-motassadeq-to-morocco/a-45838887 |date=October 15, 2018 |access-date=December 20, 2023 |website=dw.com |language=en}}</ref>
* [[Abu Dahdah]] who was arrested in November 2001, sentenced by a [[Audiencia Nacional|Spanish High Court]] and released from prison in May 2013.<ref>{{Cite web |date=May 23, 2013 |title=Alleged Al Qaeda in Spain chief Abu Dahdah released - Spain |url=http://www.ansamed.info/ansamed/en/news/nations/spain/2013/05/23/Alleged-Qaeda-Spain-chief-Abu-Dahdah-released_8754650.html |website=ANSAMed |url-status=dead |archive-url=https://web.archive.org/web/20130524161926/https://www.ansa.it/ansamed/en/news/nations/spain/2013/05/23/Alleged-Qaeda-Spain-chief-Abu-Dahdah-released_8754650.html |archive-date=May 24, 2013 |access-date=December 20, 2023}}</ref><!--Please add a summary of the period between 2008 and 2023. See the heading "Trial for role in 9/11 attacks" in Mohammed's article and "United States v. Khalid Sheikh Mohammed" for information-->
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