why did the 9/11 terrorists attack

The question "why did the 9" seems to be asking about the reasons behind the 9/11 terrorist attacks. The 9/11 attacks on September 11, 2001, were carried out by 19 terrorists from the extremist group Al Qaeda. They hijacked four commercial planes to strike major targets in the United States: two planes hit the Twin Towers of the World Trade Center in New York City, causing their collapse; a third plane hit the Pentagon near Washington, D.C.; and the fourth plane crashed in Pennsylvania after passengers tried to regain control. The attacks killed nearly 3,000 people. The motivation behind these attacks was rooted in Al Qaeda's extremist ideology and its stated opposition to U.S. policies and presence in the Middle East. The attacks aimed to cause massive destruction and to challenge U.S. power and influence globally. Al Qaeda sought to provoke a response that would rally their supporters and increase conflict involving the U.S. In response, the U.S. declared a "War on Terror," leading to military actions in Afghanistan and other global counterterrorism efforts. The legacy of 9/11 includes lasting changes in global security, U.S. foreign policy, and anti-terrorism laws worldwide.