. on the morning of september 11th, 20 years ago today, united airlines flight 93 left newark airport bound for san francisco. it was hijacked by al qaeda terrorists as part of coordinated attacks. they diverted it toward washington, d.c. a group of passengers, including tom burnett fought the hijackers to control the plane. it eventually went down in a shield in shanksville, pennsylvania. they're joining us from the memorial site in shanksville. good to see you all. dina, what has the day been like