Final answer:
During the September 11 attacks in 2001, al-Qaeda terrorists flew two planes into the Twin Towers of the World Trade Center, resulting in the deaths of approximately 2,606 people in the towers alone, and over 3,000 total fatalities including the passengers, crew members, and emergency workers.
Step-by-step explanation:
On the morning of September 11, 2001, a horrific act of terrorism took the lives of many innocent people. Terrorists from the group al-Qaeda hijacked four airliners, with two of them being flown directly into the Twin Towers of the World Trade Center in New York City. The September 11 attacks are known for their unprecedented scale and impact on the United States and the world at large. In total, the attacks resulted in the deaths of 2,606 people in the World Trade Center and hundreds more, including emergency workers and passengers on the planes.
Among the deceased were 343 heroic New York City firefighters who had entered the buildings to help save lives. The collapse of the towers not only caused a catastrophic loss of life but also heralded a new era of global security concerns. Figures vary somewhat, but it is widely recognized that more than 3,000 people died in the September 11 attacks when considering all the attack sites combined.