Pennsylvania

===21st century===
{{further|Pittsburgh synagogue shooting|United Airlines Flight 93}}
[[File:Flight93Crash.jpg|thumb|The [[Stonycreek Township, Somerset County, Pennsylvania|Stonycreek Township]] crash site of [[United Airlines Flight 93|Flight 93]], one of four planes hijacked in the [[September 11 attacks]]; the site is now a [[Flight 93 National Memorial|national memorial]]. Flight 93 passengers wrestled with [[Hijackers in the September 11 attacks|al-Qaeda terrorist hijackers]] for control of the plane, preventing it from being flown into the [[White House]] or [[United States Capitol|U.S. Capitol]].<ref name="Sources and detailed information2">[https://www.nps.gov/flni/learn/historyculture/sources-and-detailed-information.htm "Sources and detailed information"], National Park Service website</ref>]]
On September 11, 2001, during the [[September 11 attacks|terrorist attacks on the United States]], the small town of [[Shanksville, Pennsylvania]] received worldwide attention after [[United Airlines Flight 93]] crashed into a field in [[Stonycreek Township, Somerset County, Pennsylvania|Stonycreek Township]], {{convert|1.75|mi|km}} north of the town, killing all 40 civilians and four [[Al-Qaeda]] hijackers on board. The hijackers had intended to crash the plane into either the [[United States Capitol]] or [[The White House]].<ref name="Sources and detailed information2" /> After learning from family members via air phone of the earlier attacks on the [[World Trade Center (1973–2001)|World Trade Center]], however, Flight 93 passengers on board revolted against the hijackers and fought for control of the plane, causing it to crash. It was the only one of the four aircraft hijacked that day that never reached its intended target and the heroism of the passengers has been commemorated.<ref>Alexander Riley, ''Angel patriots: The crash of United Flight 93 and the myth of America'' (NYU Press, 2015) pp 1–34.</ref>

Since 2003, the [[Tekko (convention)|Tekko]] [[anime]] convention has been held annually in Pittsburgh.<ref>{{cite web |title=Tekko 2019 |url=http://www.teamtekko.us/about/ |url-status=live |archive-url=https://web.archive.org/web/20190222153355/http://www.teamtekko.us/about/ |archive-date=February 22, 2019 |access-date=February 21, 2019 |website=About Tekko}}</ref>

In October 2018, the [[Tree of Life – Or L'Simcha Congregation]], a [[Conservative Judaism|conservative Jewish]] synagogue, experienced the [[Pittsburgh synagogue shooting]], which resulted in 11 fatalities.<ref>{{cite news |date=October 28, 2018 |title='They showed his photo, and my stomach just dropped': Neighbors recall synagogue massacre suspect as a loner |newspaper=Washington Post |url=https://www.washingtonpost.com/nation/2018/10/28/victims-expected-be-named-after-killed-deadliest-attack-jews-us-history/ |url-status=live |access-date=February 21, 2019 |archive-url=https://web.archive.org/web/20181029012657/https://www.washingtonpost.com/nation/2018/10/28/victims-expected-be-named-after-killed-deadliest-attack-jews-us-history/ |archive-date=October 29, 2018}}</ref>