Most airlines also require passengers be at the boarding gate approximately 30 minutes before departure. As airport processing times vary, Delta's website suggests arriving at the airport three hours before international travel, while Virgin America recommends allowing two hours.
The film is projected with a movie projector onto a large projection screen at the front of the auditorium while the dialogue, sounds and music are played through a number of wall-mounted speakers. Since the 1970s, subwoofers have been used for low-pitched sounds.
1989: The night the Wall came down The 28-mile (45 km) barrier dividing Germany's capital was built in 1961 to prevent East Berliners fleeing to the West. But as Communism in the Soviet Republic and Eastern Europe began to crumble, pressure mounted on the East German authorities to open the Berlin border.