Quotes:

“One of the worst days in America’s history saw some of the bravest acts in Americans’ history. We’ll always honor the heroes of 9/11. And here at this hallowed place, we pledge that we will never forget their sacrifice.”
—President George W. Bush at the Pentagon in 2008

“Even the smallest act of service, the simplest act of kindness, is a way to honor those we lost, a way to reclaim that spirit of unity that followed 9/11.”
—President Obama in a 2011 radio address

“If we learn nothing else from this tragedy, we learn that life is short and there is no time for hate.”
—Sandy Dahl, wife of Flight 93 pilot Jason Dahl, in Shanksville, Pa., in 2002