And these are the versions with different framing: https://www.penser-critique.be/wp-content/uploads/2018/01/ca...
Looking at the picture of the soldiers with the tired/distressed man, there are two soldiers on either side of the distressed man. A third soldier in the foreground is holding a gun. The angle of the image has the end of the gun directly above the man's head but it possible from the real geometry that the gun is only very loosely pointed at the man, and not at the top of his head at all. I'm not suggesting here that my interpretation is correct, but it again shows how ambiguous imagery can be, even when not edited to make a point.
Edit: Looked at it a bit more, the non-water giving adjacent US soldier is not holding the guy (I think his hands are bound behind his back by cuffs/rope/zip ties/whatever).
Sharpness can drop off quickly outside the focal plane, depending on the aperture and other camera settings, so the gun barrel being blurry doesn't mean much. Whether it's 6 inches away from the POW or 6 feet away can be difficult to tell, and a photo could be staged to make either option plausible.
Found by entering "soldier gun water photo" in Google.