The Bridge on the River Kwai is a 1957 British WWII film that is preserved in the US Library of Congress National Film Registry

1. Altitude causes the Sun to rise earlier and set later than it would at that same location from the ground.
2.The Bridge on the River Kwai is a 1957 British World War II film by David Lean based on the novel, written by French writer Pierre Boulle. In 1997, this film was deemed "culturally, historically, or aesthetically significant" and selected for preservation in the United States Library of Congress National Film Registry.
3. The National Film Registry is a collection of films selected by the United States National Film Preservation Board. Each year the board selects up to 25 "culturally, historically, or aesthetically significant films" that showcase the range and diversity of American film heritage to increase awareness for its preservation. Inclusion on the list is not a guarantee of actual preservation. The librarian of Congress is the one who each year actually selects the 25 films that are preserved in the Library of Congress.