(searched, didn't find an entry)
I think every person on Earth should be required to watch it. Although it is a very long movie, you need to be in the zone to watch it. It's an artistic masterpiece of Francis Ford Coopla
It's a film set during the Vietnam war, only it's not so much a war film. A spec ops soldier is sent on a mission to kill a rogue US Army colonel because he wanted to fight the Vietnam War his own way in ways he thought were effective. On the search for him, the film takes a trip through surreal aspects of the war. The whole film is just very odd and surreal, but makes you want to keep watching.
I recommend it to anyone who likes those kinds of movies.