The 25th anniversary of the September 11 terrorist attacks was observed with formal ceremonies across multiple continents on Friday. Commemorative events took place at the three primary attack locations in the United States—New York's National September 11 Memorial, the Pentagon in Virginia, and the Flight 93 National Memorial in Pennsylvania—while international observances included a wreath-laying ceremony in London's Grosvenor Square led by US Ambassador Warren Stephens and his wife. These gatherings remembered the approximately 3,000 individuals who perished when 19 al-Qaeda operatives hijacked and crashed commercial aircraft on September 11, 2001.

The anniversary prompted both reflection on the attacks' enduring significance and innovation in how society supports survivors and the bereaved. A nonprofit organization founded in honor of Ronald Fazio Sr.—a victim who died assisting others' evacuation—introduced Doora, an artificial intelligence platform intended to help individuals navigate grief and trauma. Political figures, including President Trump at the Pentagon ceremony, alongside artists and first responders, participated in remembrance activities that emphasized themes of resilience, unity, and the continued impact of the attacks on American identity and values.