In what year did the historical film drama based on the true story of Charles Horman win The Palme d'Or?
1982 Cannes Film Festival: The 35th Cannes Film Festival was held from 14 to 26 May 1982. Missing (1982 film):  is a 1982 American historical drama film directed by Costa-Gavras and starring Sissy Spacek, Jack Lemmon, Melanie Mayron, John Shea, Janice Rule and Charles Cioffi. Missing (1982 film):  It is based on the true story of American journalist Charles Horman, who disappeared in the bloody aftermath of the US-backed Chilean coup of 1973 that deposed the democratically elected socialist President Salvador Allende.
i don't know