Flying at a speed of over the Navy Annex Building adjacent to Arlington National Cemetery,Goldberg et al., p. 14. Flight77 crashed into the Pentagon's western flank at 09:37:46. The plane struck the establishment at the first-floor level and was rolled slightly to the left, with the right wing elevated as it crashed. The front part of the fuselage immediately disintegrated upon impact, while the mid and tail sections continued moving for another fraction of a second, with tail section debris penetrating farthest into the building. In total, the aircraft took eight-tenths of a second to pass through the three outermost of the structure's five rings and unleashed a fireball that rose above the building. The 64 people aboard the flight were killed instantly, while a further 125 people in the Pentagon were either killed outright or fatally injured.
Flying at a speed of over the Navy Annex Building adjacent to Arlington National Cemetery,Goldberg et al., p. 14. Flight77 crashed into the Pentagon's western flank at 09:37:46. The plane struck the establishment at the first-floor level and was rolled slightly to the left, with the right wing elevated as it crashed. The front part of the fuselage immediately disintegrated upon impact, while the mid and tail sections continued moving for another fraction of a second, with tail section debris penetrating farthest into the building. In total, the aircraft took eight-tenths of a second to pass through the three outermost of the structure's five rings and unleashed a fireball that rose above the building. The 64 people aboard the flight were killed instantly while a further 125 people in the Pentagon were either killed outright or fatally injured.