Question

which terrorist group was responsible for the 9/11 attacks who was the leader ? where are they from ?

Answer 1

The September 11 attacks, often referred to as 9/11, were a series of four coordinated terrorist attacks by the Islamist terrorist group Al-Qaeda against the United States on the morning of Tuesday, September 11, 2001.

Step-by-step explanation:

Answer 2

Answer: by the Islamist terrorist group Al-Qaeda

Explanation: The September 11 attacks, often referred to as 9/11, were a series of four coordinated terrorist attacks by the Islamist terrorist group Al-Qaeda against the United States on the morning of Tuesday, September 11, 2001