>> melissa: vice president mike pence of the pentagon honoring 184 people who died when american airlines flight 77 crashed into the building on september 11th 2001. the brave men and women who responded, president from speaking at shanksville where flight 93 went down. sing the sacrifice of those on the plane will never be forgotten. >> we are gathered together on these hallowed grounds to honor the memory of nearly 3,000 souls who were murdered on this day 17 years ago. we are here to pay some tribute to the 40 passengers and crew members on flight 93 who rose at, defied the enemy, took control of their destiny and changed the course of history. >> melissa: senior correspondent eric shawn has