it was also a time when many people acted above and beyond the ordinary. >> reporter: the tributes continued throughout the morning with the nation pausing five more times. the moment each tag win tower f, the moment the pentagon was attacked. >> it truly an honor to be with all of you at this field of honor. >> reporter: along with vice president kamala harris, president george w. bush who served as commander in chief in 2001 led a memorial at the site. the 33 passengers and seven crew of flight 93 could have been any group of citizens selected by fate. in a sense, they stood in for us all. the terrorists soon discovered that a random group of americans is an exceptional group of people. >> reporter: at the pentagon, general mark milley, chairman of the joint chiefs, honored the victims of the attack and service members who died at the subject war in afghanistan. >> never forget those who were