Flowers are placed over names of vicitims of September 11, 2001 at the South Tower Memorial Pool before memorial observances are held at the site of the World Trade Center on September 11, 2014 in New York City.
Look back at how September 11 unfolded
On the fourteenth anniversary of the September 11 terrorist attacks, CNN looks back at the events as they unfolded.
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Remembering 9/11 15 videos
Flowers are placed over names of vicitims of September 11, 2001 at the South Tower Memorial Pool before memorial observances are held at the site of the World Trade Center on September 11, 2014 in New York City.
Look back at how September 11 unfolded
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Former US President George W. Bush speaks during a 9/11 commemoration at the Flight 93 National Memorial in Shanksville, Pennsylvania on September 11, 2021. - America marked the 20th anniversary of 9/11 Saturday with solemn ceremonies given added poignancy by the recent chaotic withdrawal of troops from Afghanistan and return to power of the Taliban. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)
Bush compares domestic violent extremists to 9/11 terrorists
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NEW YORK, NEW YORK - SEPTEMBER 11: (L-R) Former President Bill Clinton, former First Lady Hillary Clinton, former President Barack Obama, former First Lady Michelle Obama, President Joe Bien, First Lady Jill Biden, former New York City Mayor Michael Bloomberg, Bloomberg's partner Diana Taylor and Speaker of the House Nancy Pelosi (D-CA) participate in a moment of silence during the annual 9/11 Commemoration Ceremony at the National 9/11 Memorial and Museum on September 11, 2021 in New York City. During the ceremony six moments of silence were held, marking when each of the World Trade Center towers was struck and fell and the times corresponding to the attack on the Pentagon and the crash of Flight 93. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. (Photo by Chip Somodevilla/Getty Images)
Biden and Obama observe September 11th moment of silence
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Ticket agent who checked in terrorists reflects on 9/11
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'I see a plane': Widow recounts last phone call with her husband on 9/11
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Lieutenant describes being inside Pentagon day care during 9/11 attack
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Watch: CNN was covering these stories just before the 9/11 attack
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Luis Alvarez, who is about to start his 69th round of chemo on June 12, testifies at a hearing on the 9-11 Victims fund before the Judiciary subcommittee on Capitol Hill in Washington D.C. on June 11, 2019. Credit: Stefani Reynolds / CNP | usage worldwide Photo by: Stefani Reynolds/picture-alliance/dpa/AP Images
NYPD detective dies at 53 from cancer linked to 9/11 work
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9/11 first responders' gift brings Jon Stewart to tears
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Thomas Phelan passed on Friday. His passing was the result of a cancer he developed from his service on 9/11.
9/11 hero who saved hundreds dies of cancer
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A 9/11 wedding tale
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10 children continue their father's legacy after 9/11
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Last 9/11 rescue dog laid to rest
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9/11 Memorial Museum dedication
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Amid the 9/11 flames, he chose to help
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