Film could be manipulated in the same way, internegs, sandwiching, etc, just impractical in photojournalism, but theoretically possible.
Any folks who have been around longer know of any such cases of alterations when film was king? Pre2000?
This is true, but far more difficult. Would there be a global market for a publication that offered film only images? One that could be more depended on to reveal the truth as seen? It may have a possible potential, particularly in flashpoints like Syria.