Well, depending on which source you read, general change within the US moved in so many ways - and this is just a tinsy snapshot of that "US change"
(There have been no terrorist attacks on the scale of 9/11 in two decades, but from the US public’s perspective, the threat has never fully gone away.)
93% of Americans ages 30 and above said they can remember exactly where they were or what they were doing the moment they learned of the terrorist attacks on September 11, 2001. During the past six decades, only the Kennedy assassination had such a pervasive and enduring impact. It is hardly surprising, then, that more than three-quarters of American adults named 9/11 as a top historical event of their lives, nearly twice as many as for the second most-cited event.
The aftermath of the September 11 attacks caused many Americans to embrace patriotism to extreme lengths. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of American flags.
Following 9/11, the federal government moved quickly to develop a security framework to protect our country from large-scale attacks directed from abroad, while enhancing federal, state, and local capabilities to prepare for, respond to, and recover from threats and disasters at home.
Symptoms of post-traumatic stress disorder (PTSD) are the most common health effect of the 9/11 attacks. Up to 20% of adults directly exposed to the disaster or injured in the attack had PTSD symptoms five to six years after the attack; this is four times the rate in the general population.
The 9/11 attacks and their aftermath have left Americans more fearful at home, more negative about the impact of leaders’ decisions over the past two decades, and less willing to deploy American ground forces in lengthy combat abroad.
Even day to day domestic travel travel changed for all - Effective Nov. 2001, President Bush signed the Aviation and Transportation Security Act into law requiring screening conducted by federal officials, 100 percent checked baggage screening, expansion of the Federal Air Marshal Service and reinforced cockpit doors. TSA is created to oversee security in all modes of transportation.
Time has not lessened the trauma about terrorism within the US since 9/11.