Final answer:
The September 11, 2001 attack on the World Trade Center resulted in a significant loss of life and had far-reaching consequences. The event marked the beginning of the 'War on Terror' and led to efforts to combat terrorism and eliminate militant organizations.
Step-by-step explanation:
The September 11, 2001 attack on the World Trade Center resulted in a significant loss of life and had far-reaching consequences. Nearly 3,000 people, including passengers, emergency workers, and those inside the buildings, lost their lives in the terrorist attack carried out by members of the terrorist group al-Qaeda. This event marked the beginning of the 'War on Terror,' led by the United States and its allies, to combat terrorism and eliminate militant organizations.