Sept. 11, 2001

Which historic events that happened during your lifetime have had the greatest impact on America? That’s the question Pew Research Center asked more than 2,000 American adults. The No. 1 answer they got: 9/11, with 76% of the public saying the terror attacks ranked among of the top 10 nationally impactful events of their lifetimes.

“The perceived historic importance of the attacks on New York and the Pentagon span virtually every traditional demographic divide,” according to Pew. “Majorities of men and women, millennials and baby boomers, Americans with college degrees and those without a high school diploma rate 9/11 as one of the 10 most historically significant events to occur during their lifetime.”