Star Wars sequel The Empire Strikes Back is to be preserved by the US Library of Congress as part of its National Film Registry.
Also included is Star Wars director George Lucas’s student film Electronic Labyrinth: THX 1138 4EB, made in 1967.
Spike Lee’s Malcolm X, about the black political revolutionary and Saturday Night Fever also make the list.
Each year, 25 “culturally” significant films are added to the registry, which was founded in 1989.
Lucas’s Star Wars and American Graffiti are among the 550 titles already selected for preservation.
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