āEven 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.ā ā President Obama in a 2011 radio address āIf we learn nothing else from this tragedy, we learn that life is short and there is no time for hate.ā ā Sandy Dahl , wife of Flight 93 pilot Jason Dahl , in Shanksville, Pa., in 2002