Who really took the photo widely known as “Napalm Girl”?  And does it really matter over a half-century later?   In his new Netflix documentary “The Stringer”, Bao Nguyen (“The Greatest Night in Pop”) follows a journalistic team lead by Anglo-American Gary Knight as they seek to show that the real photographer on that day in 1972 in Trang Bang was not the renowned and fêted Pulitzer Prize-winning Nick Ut, of the Saigon AP Bureau, but a “stringer”, Nguyen Thanh Nghe, paid $20 flat and subsequently denied all credit.  And Nguyen argues as well that it does matter not only to Nghe and his family, but also to: the Vietnamese people; the Vietnamese diaspora (who had long lionized Ut); to an America that has still not fully dealt with the war; and to the very nature of truth in an era when technology can both clarify and complicate provenance.   You can stream “The Stringer” on Netflix.   Follow: @baomnguyen on Instagram and X @topdocspod on Instagram and X    The Presenting Sponsor of "Top Docs" is Netflix.