Man on Boeing Flight 1074 said to have shouted terrorist slogans . Passengers pinned him to the ground while plane returned to Dulles . Video emerged of him looking bloodied on floor of the United Airlines 737 . He is heard frantically apologising as police officers try to keep him calm . 33 passengers and six crew were on the plane at the time of the incident .
Man on United Airlines Flight 1074 said to have shouted terrorist slogans . Passengers pinned him to the ground while plane returned to Dulles . Video emerged of him looking bloodied on floor of the Boeing 737 . He is heard frantically apologising as police officers try to keep him calm . 33 passengers and six crew were on the plane at the time of the incident .