9/11 Anniversary Sparks Renewed Interest and Persistence of Conspiracy Theories

As the 25th anniversary of the September 11, 2001, terrorist attacks approaches, archival footage and discussions of the event are reaching new audiences, including millions of young people who were not alive at the time. The attacks, carried out by the Islamist terrorist network Al-Qaeda, involved the hijacking of four passenger planes. Two planes hit the World Trade Center towers in New York, one hit the Pentagon in Washington, and a fourth crashed in Pennsylvania after passengers intervened. The attacks killed nearly 3,000 people and caused thousands of injuries.

Modern digital platforms like TikTok, YouTube, and X are facilitating a resurgence of interest in the event, but they are also fueling the spread of long-standing conspiracy theories. Some viewers are discovering the events through raw TV coverage or documentaries, while others encounter claims that the U.S. government was involved or that the towers were brought down by controlled demolitions. A 2023 YouGov poll indicated that one in five Americans believed the U.S. government was behind the attacks.

Experts and official investigations have countered these narratives. The National Institute of Standards and Technology (NIST), the Massachusetts Institute of Technology (MIT), and Weidlinger Associates concluded that the impact of the planes and the resulting fires led to the collapse of the buildings. Psychologists and historians suggest that conspiracy theories often flourish during sudden, unexpected events because they provide a sense of control or certainty in the face of fear and unanswered questions.

While some news organizations and networks are using the anniversary to re-share archival content and factual history, the chaotic nature of social media feeds often blurs the line between historical record and misinformation.