The image of a naked girl fleeing a napalm attack in South Vietnam on 8 June, 1972, is one of the most defining images of the 20th Century. But who clicked it? For years, the credit for the Pulitzer-winning picture went to photographer Nick Ut.

The authorship of The Associated Press’s renowned “napalm girl” photograph is being called into question in the new documentary. The AP said it has no reason to conclude that no one other than the long-credited photographer,

"The Stringer" at Sundance alleges the famed Vietnam War photo "The Terror of War," or "Napalm Girl," was not taken by Nick Ut. The AP and Ut deny the claims.

The Associated Press says it is "ready to review any and all evidence and new information" regarding the Pulitzer Prize-winning photo of a naked girl running from a napalm attack credited to AP staffer Nick Ut,

After half a century, a Vietnamese freelance photographer, has claimed he is the real creator of the infamous image, sold for $20 and credited to an AP staff photographer

Pulitzer Prize-winning photographer Nick Ut (with framed picture), flanked by Kim Phuc, known as the "Napalm Girl", shows his Vietnam war photo as they wait to meet Pope Francis in St Peter's Square,