View source for Closings and cancellations following the September 11 attacks

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Many closings and cancellations followed the [[September 11 attacks]], including major landmarks, buildings, restrictions on access to [[Lower Manhattan]], as well as postponement or cancellation of major sporting and other events.  Landmarks were closed primarily because of fears that they may be attacked. At some places, streets leading up to the institutions were also closed. When they reopened, there was heightened security. Many [[U.S. states]] declared a [[state of emergency]].<ref>{{Cite web|url=http://edition.cnn.com/2001/US/09/11/attack.closings/index.html|title=CNN.com - Attacks prompt widespread closings - September 12, 2001|website=CNN|access-date=July 7, 2017|archive-url=https://web.archive.org/web/20170912014337/http://edition.cnn.com/2001/US/09/11/attack.closings/index.html|archive-date=September 12, 2017|url-status=live|df=mdy-all}}</ref>

==<span class="anchor" id="Lower Manhattan direct effects"></span>Lower Manhattan==

Speaking at a press conference at 11:02&nbsp;a.m. on the morning of the attacks, Mayor [[Rudy Giuliani]] told New Yorkers: "If you are south of Canal Street, get out. Walk slowly and carefully. If you can't figure what else to do, just walk north."<ref name="USDOT">{{cite web|url=https://rosap.ntl.bts.gov/view/dot/4339|title=Effects of Catastrophic Events on Transportation System Management and Operations: New York City – September 11|author=U.S. Department of Transportation, Research and Special Programs Administration, Volpe National Transportation Systems Center|date=April 2002|access-date=November 3, 2020|archive-url=https://web.archive.org/web/20130305144248/http://ntl.bts.gov/lib/jpodocs/repts_te/14129.htm|archive-date=March 5, 2013|url-status=live|df=mdy-all}}</ref> The neighborhood was covered in dust and debris, and electrical failures caused traffic light outages. Emergency vehicles were given priority to respond to ongoing fires, building collapses, and expected mass casualties.  Over a million workers and residents south of Canal Street were evacuated, and police stopped pedestrians from entering Lower Manhattan. With subways shut down, vehicle traffic restricted, and tunnels closed, they mainly fled on foot, pouring over bridges and ferries to Brooklyn and New Jersey.<ref name="USDOT" />

On September 12, vehicle traffic was banned south of 14th Street, subway stations south of Canal Street were bypassed, and pedestrians were not permitted below Chambers Street. Vehicle traffic below Canal Street was not allowed until October 13.<ref name="USDOT" />

The [[New York Stock Exchange]] (NYSE) did not open on September 11 even as [[CNBC]] showed futures numbers early in the day. As [[Wall Street]] was covered in debris from the [[World Trade Center (1973-2001)|World Trade Center]] (WTC) and suffered infrastructure damage, it remained closed until September 17.

===<span class="anchor" id="Manhattan bridges, and tunnels"></span>Bridges and tunnels===

For at least a full day after the attacks, [[MTA Bridges & Tunnels|bridges and tunnels]] to Manhattan were closed to non-emergency traffic in both directions. Among other things, this interrupted scheduled deliveries of food and other perishables, leading to shortages in restaurants. Most of these reopened, fully or partially, by September 14, but vehicles were subject to security checks, and the eastbound [[Holland Tunnel]] remained closed until October 15 because of its proximity to the World Trade Center site.<ref name="usdotreport">{{cite web |last1=DeBlasio |first1=Allan |last2=Regan |first2=Terrance |last3=Zirker |first3=Margaret |last4=Day |first4=Brian |last5=Crowder |first5=Michelle |last6=Bagdonas |first6=Kathleen |last7=Brodesky |first7=Robert |last8=Morin |first8=Dan |title=Effects of Catastrophic Events on Transportation System Management and Operations, New York City – September 11 |url=http://ntl.bts.gov/lib/jpodocs/repts_te/14129_files/14129.pdf |website=[[Bureau of Transportation Statistics]] |publisher=[[United States Department of Transportation]] |access-date=October 27, 2025 |archive-url=https://web.archive.org/web/20130305144225/http://ntl.bts.gov/lib/jpodocs/repts_te/14129_files/14129.pdf |archive-date=March 5, 2013 |date=April 2002}}</ref>

Many Manhattan office workers returned to their jobs for the first time on Monday, September 24. With security restrictions creating hours-long delays, drivers entering the city experienced severe traffic jams.<ref>Evans, Martin C. [https://www.newspapers.com/article/newsday-suffolk-edition/183842105/ "Long Traffic Delays Into City Expected"], ''[[Newsday]]'', September 23, 2001, page A38.</ref><ref>Donohue, Pete. [https://www.newspapers.com/article/daily-news/183843060/ "Traffic worst yet, says DOT"], ''[[New York Daily News]]'', September 25, 2001, page 10.</ref> Officials urged commuters to take mass transit instead of driving, and a spokesman for the [[New York City Department of Transportation]] said that September 25 "might have been the worst traffic day since [[Henry Ford]] invented the car."<ref>Ung, Elisa, and Miriam Hill. [https://www.newspapers.com/article/the-philadelphia-inquirer/183843137/ "Businesses try to hang on as N.Y.C. recovers"], ''[[Philadelphia Inquirer]]'', September 30, 2001, page A23.</ref><ref name="usdotreport"/>

To alleviate the traffic, city officials activated an [[High-occupancy vehicle lane|HOV]] plan that had been created in the 1980s but never used. Starting September 27, cars with only one occupant (estimated to make up 64% of vehicles entering Manhattan) were not allowed to cross any of the bridges and tunnels connecting to the island south of 63rd Street on weekdays between 6:00 and 11:00&nbsp;a.m. On October 17, the ending time of the ban was moved to 10:00&nbsp;a.m. An NYC DOT study found that traffic during these hours was reduced by 15%. However, many chose to enter Manhattan earlier, leading to a 26% increase in traffic during the hour between 5:00 and 6:00&nbsp;a.m.<ref name="usdotreport"/> Some advocated for the rule to be put in place permanently, but it was based on the city's emergency administrative powers and provoked threats of lawsuits from parking garage owners. The ban was lifted for some bridges and tunnels on April 22, 2002, though it remained in place for the Holland and [[Brooklyn Battery Tunnel]]s and the [[Brooklyn Bridge|Brooklyn]] and [[Manhattan Bridge]]s.<ref>Rife, Judy. [https://www.recordonline.com/story/business/2002/04/24/occupancy-ban-lifted-tunnel-traffic/50200061007/ "Occupancy ban lifted; tunnel traffic rises 17%"], ''[[Times Herald-Record]]'', April 24, 2002. Retrieved October 27, 2025.</ref> The remaining restrictions were removed on November 17, 2003.<ref>[https://www.newspapers.com/article/the-jersey-journal/183843963/ "Traffic restrictions being lifted"], ''[[The Jersey Journal]]'', November 12, 2003, page A3.</ref>

===Mass transit===

====<span class="anchor" id="NYC Subway"></span>New York City Subway====
[[File:NYCTA-Miller,G_CD1-043.jpg|thumb|right|300px|The [[Cortlandt Street (IRT Broadway–Seventh Avenue Line)|Cortlandt Street]] IRT station, which was directly below the World Trade Center, after the September 11 attacks]]

The tracks and stations under the [[World Trade Center (1973-2001)|World Trade Center]] were shut down within minutes of the first plane crash. All remaining [[New York City Subway]] service was suspended from 10:20&nbsp;a.m. to 12:48&nbsp;p.m.<ref name="USDOT" /> Immediately after the attacks and more so after the collapses of the Twin Towers, many trains running in Lower Manhattan lost power and had to be evacuated through the tunnels. Some trains had power but the signals did not, requiring special operating procedures to ensure safety.

The [[IRT Broadway–Seventh Avenue Line]], which ran below the World Trade Center between [[Chambers Street (IRT Broadway–Seventh Avenue Line)|Chambers Street]] and [[Rector Street (IRT Broadway–Seventh Avenue Line)|Rector Street]], was the most crippled. This section of the tunnel, including [[Cortlandt Street (IRT Broadway–Seventh Avenue Line)|Cortlandt Street]] station (located directly underneath the World Trade Center), was badly damaged, and had to be rebuilt. Service was immediately suspended south of Chambers Street and then cut back to [[14th Street (IRT Broadway–Seventh Avenue Line)|14th Street]]. There was also subsequent flooding on the line south of [[34th Street–Penn Station (IRT Broadway–Seventh Avenue Line)|34th Street–Penn Station]]. After the flood was cleaned up, express service was able to resume on September 17 with {{NYCS|1}} trains running between [[Van Cortlandt Park–242nd Street (IRT Broadway–Seventh Avenue Line)|Van Cortlandt Park–242nd Street]] and 14th Street, making local stops north of and express stops south of [[96th Street (IRT Broadway–Seventh Avenue Line)|96th Street]], while {{NYCS|2}} and {{NYCS|3}} trains made all stops in Manhattan (but bypassed all stations between [[Canal Street (IRT Broadway–Seventh Avenue Line)|Canal Street]] and [[Fulton Street (IRT Broadway–Seventh Avenue Line)|Fulton Street]] until October 1). 1/9 [[Skip-stop#Rail operation|skip-stop service]] was suspended.

After a few switching delays at 96th Street, service was changed on September 19. The {{NYCS service|1}} train resumed local service in Manhattan, but was extended to [[New Lots Avenue (IRT New Lots Line)|New Lots Avenue]] in Brooklyn (switching onto the express tracks at Chambers Street) to replace the 3, which now terminated at 14th Street as an express. The {{NYCS service|2}} train continued to make local stops in Manhattan and service between Chambers Street and [[South Ferry loops (IRT Broadway–Seventh Avenue Line)|South Ferry]] as well as skip-stop service remained suspended. Normal service on all four trains was restored September 15, 2002, but Cortlandt Street remained closed until September 8, 2018.<ref>Kennedy, Randy. [https://www.nytimes.com/2002/09/17/nyregion/tunnel-vision-with-station-s-reopening-even-commuters-smile.html "Tunnel Vision; With Station's Reopening, Even Commuters Smile"] {{Webarchive|url=https://web.archive.org/web/20180729051928/https://www.nytimes.com/2002/09/17/nyregion/tunnel-vision-with-station-s-reopening-even-commuters-smile.html |date=July 29, 2018 }}, ''[[The New York Times]]'', September 17, 2002. Accessed October 6, 2007.</ref>

Service on the [[BMT Broadway Line]] was also disrupted because the tracks from the [[Montague Street Tunnel]] run adjacent to the World Trade Center and there were concerns that train movements could cause unsafe settling of the debris pile. [[Cortlandt Street (BMT Broadway Line)|Cortlandt Street]] station, which sits under [[Church Street (Manhattan)|Church Street]], sustained significant damage in the collapse of the towers. It was closed until September 15, 2002 for removal of debris, structural repairs, and restoration of the track beds, which had suffered flood damage in the aftermath of the collapse. Starting September 17, 2001, {{NYCS|N}} and {{NYCS|R}} service was suspended and respectively replaced by the {{NYCS service|M}} (which was extended to [[Coney Island–Stillwell Avenue (BMT Sea Beach Line)|Coney Island–Stillwell Avenue]] via the [[BMT Montague Street Tunnel]], [[BMT Fourth Avenue Line]], and [[BMT Sea Beach Line]]) and the {{NYCS service|J}} (also extended via Fourth Avenue to [[Bay Ridge–95th Street (BMT Fourth Avenue Line)|Bay Ridge–95th Street]]). In Queens, the {{NYCS service|Q}} replaced the {{NYCS service|R}} while the {{NYCS service|W}} replaced the {{NYCS|N}}. All service on the BMT Broadway Line ran local north of [[Canal Street (BMT Broadway Line)|Canal Street]] except for the &lt;Q&gt;, which ran normally from [[57th Street–Seventh Avenue (BMT Broadway Line)|57th Street]] to [[Brighton Beach (BMT Brighton Line)|Brighton Beach]] via Broadway and Brighton Express. J/Z skip-stop service was suspended at this time. Normal service on all seven trains resumed on October 28.

The [[IND Eighth Avenue Line]], which has a stub terminal serving the {{NYCS|E}} train under [[Five World Trade Center]], was undamaged, but covered in soot. E trains were extended to [[Euclid Avenue (IND Fulton Street Line)|Euclid Avenue]], Brooklyn, replacing the then suspended {{NYCS|C}} train (the {{NYCS|A}} and {{NYCS|D}} trains replaced it as the local north of [[59th Street–Columbus Circle (IND Eighth Avenue Line)|59th Street–Columbus Circle]] on nights and weekends, respectively. The {{NYCS|B}} train, which ran normally from [[145th Street (IND Eighth Avenue Line)|145th Street]] or [[Bedford Park Boulevard (IND Concourse Line)|Bedford Park Boulevard]] to [[34th Street–Herald Square (New York City Subway)|34th Street–Herald Square]] via Central Park West Local, also replaced C trains on weekdays). Service was cut back to [[Canal Street (IND Eighth Avenue Line)|Canal Street]] when C service resumed on September 21, but [[Chambers Street (IND Eighth Avenue Line)|Chambers Street]] and [[Fulton Street (IND Eighth Avenue Line)|Broadway–Nassau Street]] remained closed until October 1. [[World Trade Center (IND Eighth Avenue Line)|World Trade Center]] remained closed until January 2002.

The only subway line running between Midtown and Lower Manhattan nearby the former World Trade Center Complex was the [[IRT Lexington Avenue Line]], which was overcrowded before the attacks and at crush density until the BMT Broadway Line reopened. [[Wall Street (IRT Lexington Avenue Line)|Wall Street]] was closed until September 21.

The IND 6th Avenue line and BMT Nassau Street line were the only two routes in lower Manhattan to be completely unaffected by the 9/11 attacks due to them not being near the complex itself 

There were no reported casualties on the subway or loss of train cars, but a [[Motor Coach Industries]] coach bus was destroyed. Another bus was damaged, but was repaired and returned to normal service with a special commemoration livery.

====PATH====
[[PATH (rail system)|PATH]] started evacuating passengers from its Manhattan trains and tracks within minutes of the first plane crash.<ref name="USDOT" /> The [[World Trade Center (PATH station)|PATH station at World Trade Center]] was heavily damaged (a train parked in the station was crushed by debris and was removed during the excavation process in January 2002) and all service  was suspended. For several hours, PATH did not run any trains to Manhattan, but was able to restore service on the [[Uptown Hudson Tubes]] to [[33rd Street station (PATH)|33rd Street]] by the afternoon.<ref name="USDOT" />  [[Exchange Place (PATH station)|Exchange Place]] was unusable since the switch configuration at the time required all trains to continue to World Trade Center. As a result, PATH ran a modified service: Hoboken-Journal Square, Hoboken-33rd Street, and Newark-33rd Street. Exchange Place reopened with modifications on June 29, 2003; a temporary station replacing World Trade Center opened on November 23.

====Ferries====
[[Liberty Water Taxi]] and [[NY Waterway]] had a ferry terminal at the [[Brookfield Place (New York City)|World Financial Center]]. As the area around the terminal was in the restricted zone, NY Waterway suspended service to the terminal with alternate service going to [[Midtown Manhattan|Midtown]] and [[Wall Street]] and Liberty Water Taxi service was suspended. Free ad-hoc ferry service to New Jersey, Brooklyn, and Queens began by evening, with about [[Maritime response following the September 11 attacks|half a million evacuees transported]] by Circle Line Tours, NY Waterway, privately owned dining boats, tug boats, and at least one fire boat.<ref name="USDOT" />

====<span class="anchor" id="Local Bus"></span>Buses====
[[Metropolitan Transportation Authority]] buses were temporarily suspended south of Canal Street, and MTA and NJ Transit buses were re-routed to serve passengers arriving in Brooklyn and New Jersey by walking and taking ferries out of Manhattan.

====Intercity transit====
The [[Port Authority Bus Terminal]] was closed until September 13. [[Amtrak]] suspended all of its rail service nationwide until 6pm, but by September 13 it had increased its capacity by 30% to deal with an influx of stranded flight passengers.<ref name="USDOT" /> [[Greyhound Bus Lines]] cancelled its bus service in the Northeast, but was running normally by September 13.<ref name="USDOT" />

==North American airspace==
{{See also|Operation Yellow Ribbon}}
The entire airspaces of the United States and Canada<ref>{{cite web|url=http://www.nysing.org/timeline.html|title=September 11, 2001|access-date=September 30, 2014|archive-url=https://web.archive.org/web/20141018173802/http://www.nysing.org/timeline.html|archive-date=October 18, 2014|url-status=dead|df=mdy-all}}</ref> were closed ("[[ground stop]]") by order of FAA National Operations Manager [[Ben Sliney]] (who was working his first day in that position)<ref>{{cite web | url = http://www.metro.co.uk/fame/interviews/article.html?in_article_id=20603&in_page_id=11 | date = 2006-10-04 | title = 60 Seconds: Ben Sliney | first = Andrew | last = Williams | work = [[Metro (Associated Metro Limited)|Metro online]] | publisher = Associated Northcliffe Digital | location = London | access-date = 2010-04-13 | archive-url = https://web.archive.org/web/20080529141832/http://www.metro.co.uk/fame/interviews/article.html?in_article_id=20603&in_page_id=11 | archive-date = May 29, 2008 | url-status = live | df = mdy-all }}</ref> except for military, police, and medical flights. The unprecedented implementation of [[Security Control of Air Traffic and Air Navigation Aids]] (SCATANA) was the first unplanned closure in the U.S.; military exercises known as [[Operation Skyshield]] had temporarily closed the airspace in the early 1960s. Domestic planes were diverted to the nearest available airport, and grounded passengers and planes were searched for security threats. [[United Airlines]] cancelled all flights worldwide temporarily. President [[George W. Bush]] was transported to a secure location via [[Air Force One]]. Many incoming international flights were diverted to [[Atlantic Canada]] to avoid proximity to potential targets in the United States and large cities in Canada. Some international flights that departed from South America were diverted to [[Mexico]], as its airspace was not shut down. 

During the closure of American airspace, there were only a few civilian flights which received special approval to fly from the FAA, such as the [[Civil Air Patrol]]'s aerial photography unit which conducted aerial surveys of the damage to New York.<ref>{{Cite web |last=Dapcevich |first=Madison |date=2024-09-22 |title=Only Civilian Plane Allowed to Fly on 9/11 Delivered Snake Bite Antivenom? |url=https://www.snopes.com//fact-check/antivenom-only-civilian-plane-allowed-to-fly-911/ |access-date=2025-09-17 |website=Snopes |language=en}}</ref>

On Thursday night, the New York area airports ([[John F. Kennedy International Airport|JFK]], [[LaGuardia Airport|LaGuardia]], and [[Newark Liberty International Airport|Newark]]) were closed again and reopened the next morning. The only traffic from LaGuardia during the closure was a single C-9C government VIP jet, departing at approximately 5:15 p.m. on the 12th.{{cn|date=September 2025}} Civilian air traffic was allowed to resume on September 13, with stricter airport security checks, disallowing for example the box cutting knives that were used by the hijackers.  (Reinforcement of cockpit doors began in October 2001, and was required for larger airlines by 2003.<ref>{{cite web|url=http://www.faa.gov/news/press_releases/news_story.cfm?newsId=5470|title=Press Release – FAA Sets New Standards for Cockpit Doors|access-date=September 30, 2014|url-status=dead|archive-url=https://web.archive.org/web/20141006083905/http://www.faa.gov/news/press_releases/news_story.cfm?newsId=5470|archive-date=October 6, 2014|df=mdy-all}}</ref>) First, stranded planes were allowed to fly to their intended destinations, then limited service resumed. The backlog of delayed passengers took several days to clear. 

Due to a translation error, controllers believed [[Korean Air Flight 85]] might have been hijacked. [[Prime Minister of Canada|Canadian Prime Minister]] [[Jean Chrétien]] and U.S. authorities ordered the United States Air Force to surround the plane and force it to land in [[Whitehorse, Yukon]] and to shoot down the plane if the pilots did not cooperate. Alaska Governor [[Tony Knowles (politician)|Tony Knowles]] ordered the evacuation of large hotels and government buildings in Anchorage. Also in Alaska at nearby [[Valdez, Alaska|Valdez]], the [[U.S. Coast Guard]] ordered all tankers filling up with oil to head out to sea. Canadian officials evacuated all schools and large buildings in Whitehorse before the plane landed safely.<ref>{{Cite web |url=http://www.alaskapublic.org/2011/09/12/second-controller-speaks-about-korean-airliner-incident-on-911/ |title=Second Controller Speaks About Korean Airliner Incident on 9/11 |date=September 13, 2011 |access-date=April 4, 2012 |archive-url=https://web.archive.org/web/20120604222956/http://www.alaskapublic.org/2011/09/12/second-controller-speaks-about-korean-airliner-incident-on-911/ |archive-date=June 4, 2012 |url-status=live |df=mdy-all }}</ref><ref name="mccarthy01">{{cite web|date=September 12, 2002 |url=http://www.ctv.ca/special/sept11/hubs/canadian/mccarthy01.html |title=PM says U.S. attitude helped fuel Sept. 11 |publisher=Bell Globemedia Interactive Inc |access-date=March 19, 2009 |last=McCarthy|first=Shawn|url-status=dead |archive-url=https://web.archive.org/web/20030203055534/http://www.ctv.ca/special/sept11/hubs/canadian/mccarthy01.html |archive-date=February 3, 2003 }}</ref><ref name="CNNalaska.sept11">{{cite web|date=August 14, 2002|url=http://edition.cnn.com/2002/US/08/14/alaska.sept11/|title=Korean jet in 9/11 'hijack' scare|publisher=[[CNN News]]|access-date=March 19, 2009|first=Patty|last=Davis|archive-url=https://web.archive.org/web/20121015110745/http://edition.cnn.com/2002/US/08/14/alaska.sept11/|archive-date=October 15, 2012|url-status=live|df=mdy-all}}</ref><ref name="Documentary">{{cite web|year = 2002|url = https://www.imdb.com/title/tt0373693|title = Attack on the U.S.A.: Canadian Service of Remembrance|format = Documentary|publisher = [[CBC News]]|access-date = March 19, 2009|archive-url = https://web.archive.org/web/20050115014008/http://imdb.com/title/tt0373693/|archive-date = January 15, 2005|url-status = live|df = mdy-all}}</ref>

==Precautionary building closings and evacuations==
Many businesses across the United States closed after the intentional nature of the events became clear, and many national landmarks and financial district skyscrapers were evacuated out of fear of further attacks.

===United States===
* [[Headquarters of the United Nations|United Nations Headquarters Building]] in New York City
* Most skyscrapers in New York City (including the [[Chrysler Building]] and [[Empire State Building]], which was evacuated several times on September 11 and after due to false reports of potential threats), Chicago (including [[Willis Tower|Sears Tower]])<ref name="abelson">{{cite news |title=Absorbing a Blow to the Heart of America's Financial Center |work=[[The New York Times]] |date=September 12, 2001 |last=Abelson |first=Reed |url=https://www.nytimes.com/2001/09/12/business/day-terror-reaction-absorbing-blow-heart-america-s-financial-center.html |page=C1 |access-date=February 6, 2017 |archive-url=https://web.archive.org/web/20170731154337/http://www.nytimes.com/2001/09/12/business/day-terror-reaction-absorbing-blow-heart-america-s-financial-center.html |archive-date=July 31, 2017 |url-status=live |df=mdy-all }}</ref> and Philadelphia
* The [[Washington Monument]] in Washington, D.C.
* The [[Statue of Liberty]], [[Ellis Island]] and ferries to both in and out of New York City
* All state capitols and many government buildings surrounding the capitols{{citation needed|date=September 2013}}
* Many landmarks in the United States, including the [[Mall of America]] outside of [[Minneapolis]], [[Minnesota]] and the [[Space Needle]] and [[Columbia Center]] in [[Seattle]], [[Washington (state)|Washington]]
* All federal buildings in Washington, D.C., including the [[White House]], the [[United States Capitol]], the [[United States Supreme Court Building]] and [[Blair House]]. Across the country, approximately one million federal workers were sent home
*The D.C. Department of Motor Vehicles (although all other D.C. government offices remained open)<ref>{{Cite news | title = Washington area evacuation and closures | newspaper = The Washington Post | date = September 11, 2001 | url = https://www.washingtonpost.com/wp-srv/metro/daily/sep01/localclosures091101.htm | access-date = September 12, 2010 | archive-url = https://web.archive.org/web/20121111112109/http://www.washingtonpost.com/wp-srv/metro/daily/sep01/localclosures091101.htm | archive-date = November 11, 2012 | url-status = live | df = mdy-all }}</ref>
*The United States Patent and Trademark Office<ref>{{Cite press release  | title = Emergency Closure - September 11, 2001  | publisher = United States Patent and Trademark office  | date = September 11, 2001  | url = http://www.uspto.gov/emergencyalerts/emergencyclosure01.htm  | access-date = September 12, 2010  | archive-url = https://web.archive.org/web/20100527120520/http://www.uspto.gov/emergencyalerts/emergencyclosure01.htm  | archive-date = May 27, 2010  | url-status = live  | df = mdy-all  }}</ref>
*[[NASA]], including all field centers and the agency's headquarters in Washington, D.C.<ref>{{cite web|author= O'Brien, Miles|title= NASA shuts down in wake of attacks|url= http://articles.cnn.com/2001-09-11/tech/nasa.closed_1_nasa-field-centers-nasa-administrator-daniel-goldin-space-administration?_s=PM:TECH|date= September 11, 2001|work= Cnn.Com|access-date= September 12, 2010|archive-url= https://web.archive.org/web/20101130054725/http://articles.cnn.com/2001-09-11/tech/nasa.closed_1_nasa-field-centers-nasa-administrator-daniel-goldin-space-administration?_s=PM:TECH|archive-date= November 30, 2010|url-status= dead|df= mdy-all}}</ref>
*Resorts and vacation spots including:
**[[Disneyland Resort|Disneyland]] and [[Knotts Berry Farm|Knott's Berry Farm]] (only on September 11)<ref name="abelson"/>
**[[Walt Disney World]] (only on September 11)
**[[Universal Studios Florida]]
**[[Universal Studios Hollywood]]
**[[SeaWorld]]
**[[Six Flags]]
*All television and movie studios in [[Hollywood, Los Angeles|Hollywood]], [[Los Angeles]], [[California]]
*All [[Westfield Group|Westfield]] shopping centers, malls and shoppingtowns nationwide, as they owned the underground shopping mall at the World Trade Center{{citation needed|date=September 2013}}
* The [[200 Clarendon Street|John Hancock Tower]] and [[Prudential Tower]] in [[Boston]]<ref name="abelson"/>
* [[1400 Smith Street|Enron Complex]] and several other skyscrapers in [[Downtown Houston]]<ref>{{Cite book|last=Eichenwald|first=Kurt|url=http://worldcat.org/oclc/973543262|title=Conspiracy of fools : a true story|date=2005|publisher=Broadway Books|isbn=0-7679-1179-2|oclc=973543262}}</ref>
* The [[Transamerica Pyramid]] in [[San Francisco]]
* Several buildings in downtown [[Cleveland]] including [[Terminal Tower]], the [[Anthony J. Celebrezze Federal Building]] and [[Key Tower]]<ref>{{cite web|title=ROGUE WAVE: The U.S. Coast Guard on and after 9/11|url=https://media.defense.gov/2020/Apr/02/2002273967/-1/-1/0/ROGUE%20WAVE%20CG%20&%209-11.PDF|last=Capelotti|first=Chief Petty Officer P.J.|website=media.defense.gov|publisher=U.S. Coast Guard Historians Office|access-date=November 19, 2023}}</ref>
* The [[U.S. Steel Tower]] in [[Pittsburgh]]
* The [[Renaissance Center]] in [[Detroit]]
* The [[IDS Center|IDS Tower]] in [[Minneapolis]]
* [[Bank of America]] and [[Wachovia]] headquarters towers in [[Uptown Charlotte]]
* The [[Minnesota World Trade Center|World Trade Center]] in [[Saint Paul, Minnesota]]
* [[OneAmerica Tower]] in [[Indianapolis]]
* [[HSBC Bank USA|HSBC]] Tower in [[Buffalo, New York]]
* [[AXA]] Towers in [[Syracuse, New York]]
* [[Tribune Entertainment|Sunset Bronson Studios]] in Hollywood
* [[AOL]] Headquarters in [[Dulles, Virginia]]

===International===
*{{flagicon|CAN}} [[Toronto]]: [[CN Tower]], [[Toronto-Dominion Centre]], [[Toronto Stock Exchange]]
*{{flagicon|CAN}} [[Ottawa]]: [[Parliament Hill]], [[Supreme Court of Canada]]<ref>{{Cite web|title=Timeline: 9/11 and Canada|url=https://www.cpac.ca/en/cpac-in-focus/timeline-9-11-and-canada/|access-date=2021-06-07|website=CPAC|language=en-US|archive-date=September 30, 2020|archive-url=https://web.archive.org/web/20200930001717/https://www.cpac.ca/en/cpac-in-focus/timeline-9-11-and-canada/|url-status=dead}}</ref>
*{{flagicon|GBR}} [[London]]: [[Canary Wharf]], [[Lloyd's building]], [[Stock Exchange Tower]], [[Tower 42|NatWest Tower]]<ref>{{Cite news|date=2001-09-11|title=UK buildings evacuated|language=en-GB|url=http://news.bbc.co.uk/2/hi/uk_news/1538156.stm|access-date=2021-06-07}}</ref>
*{{flagicon|Malaysia}} [[Kuala Lumpur]]: [[Petronas Towers]]

==Government and cultural cancellations and postponements==
{{see also|List of entertainment affected by the September 11 attacks}}

In an atmosphere reminiscent of the [[assassination of John F. Kennedy]] in 1963, everyday life in many places around the world came to a standstill in the days after the September 11 attacks. For this reason, as well as for reasons of perceived threat associated with large gatherings, many events were postponed or cancelled.  Other events were also cancelled, postponed, or modified:
*Voting on September 11 in the [[2001 New York City mayoral election|New York City mayoral primary]] was halted. Elections in [[Syracuse, New York|Syracuse]] and [[Buffalo, New York]] were also delayed.
*The [[Commonwealth Heads of Government Meeting]] (CHOGM), with the [[Commonwealth Heads of Government|Heads of Government]] of the [[Commonwealth of Nations]] to be held in [[Brisbane]], the state capital of [[Queensland]], [[Australia]], was postponed.  The organizers of the meeting claimed it was not so much a fear of terrorist attack on the meeting itself, but a desire by many Commonwealth leaders to stay at home in case of any further crisis-making world events (such as the commencement of overt military action in Afghanistan or elsewhere).  The [[Commonwealth Heads of Government Meeting 2002|CHOGM was eventually convened]] at [[Coolum Beach, Queensland]].
*The Mexican Independence Parade scheduled for September 16 in [[Mexico City]] was delayed one day in a show of compassion; many other independence celebrations were held on the 16th without fireworks.
*Clothing retailer [[Abercrombie & Fitch]] canceled its Christmas 2001 issue of ''[[A&F Quarterly]]'' because the company felt the tone of the publication was not suitable for the mood at that time.<ref>Stuart Elliott, [https://www.nytimes.com/2001/10/17/business/media-business-advertising-bowing-nation-s-mood-retailer-cancels-issue-racy.html?pagewanted=all Bowing to Nation's Mood, Retailer Cancels Issue of Racy Catalog] {{Webarchive|url=https://web.archive.org/web/20180628021021/https://www.nytimes.com/2001/10/17/business/media-business-advertising-bowing-nation-s-mood-retailer-cancels-issue-racy.html?pagewanted=all |date=June 28, 2018 }}, ''New York Times'', October 17, 2001.</ref>

== See also ==
[[Air traffic control during the September 11 attacks]]

==References==
{{Reflist}}

{{September 11}}

{{DEFAULTSORT:Closings And Cancellations Following The September 11 Attacks}}
[[Category:Aftermath of the September 11 attacks]]
[[Category:History of the New York City Subway]]