
Determine the topic of the question-answer pair.
Question: "what is 9/11 bombings?";  Answer: "The September 11 attacks (also referred to as September 11, September 11th, or 9/11) were a series of four coordinated terrorist attacks launched by the Islamic terrorist group al-Qaeda upon the United States in New York City and the Washington, D.C. area on September 11, 2001."? Topic: 