For the 20th time, America will pause for, read the names of and remember the nearly 3,000 people killed in the Sept. 11 attacks that stunned and forever changed the nation. RELATED: https://www.usatoday.com/story/news/nation/2021/09/11/9-11-anniversary-nyc-pentagon-shanksville-ceremonies-honor-victims/8255570002/ In New York City, at the Pentagon and outside Shanksville, Pennsylvania, ceremonies to remember the attacks that occurred there 20 years ago are being held Saturday, and President Joe Biden plans to visit each site. The 20th anniversary of the attacks comes amid the United States' chaotic withdrawal from Afghanistan, a war started in response to the attacks and one that has left many 9/11 families and survivors, veterans and Americans with mixed emotions. » Subscribe to USA TODAY: http://bit.ly/1xa3XAh » Watch more on this and other topics from USA TODAY: https://bit.ly/3gfVR90 » USA TODAY delivers current local and national news, sports, entertainment, finance, technology, and more through award-winning journalism, photos, videos and VR.