Little Dieter Needs to Fly (1997)
https://www.imdb.com/title/tt0145046/
German-American Dieter Dengler discusses his service as a U.S. naval pilot in the Vietnam War. Dengler also revisits the sites of his capture and eventual escape from the hands of the Viet Cong, recreating many events for the camera.
One of my favorite Werner Herzog documentaries.