I want to know the answer to the following question:
How many leader terrorists of Al Quada were involved with the 9/11 attacks directly that day?
All the background I'm provided with is that "The city and surrounding area suffered the bulk of the economic damage and largest loss of human life in the aftermath of the September 11, 2001 attacks when 10 of the 19 terrorists associated with Al-Qaeda piloted American Airlines Flight 11 into the North Tower of the World Trade Center and United Airlines Flight 175 into the South Tower of the World Trade Center, and later destroyed them, killing 2,192 civilians, 343 firefighters, and 71 law enforcement officers who were in the towers and in the surrounding area.". Is that enough to answer the question?
Answer: yes