Virtual JFK (2008)
Virtual JFK: Vietnam if Kennedy Had Lived is a 2008 documentary film by Koji Masutani. It applies what Niall Ferguson of Harvard University has called 'virtual history' to consider what President John F. Kennedy might have done in Vietnam if he had not been assassinated in 1963. The film was unveiled at the 2008 HotDocs Canadian International Documentary Film Festival, and its theatrical premiere took place at New York City's Film Forum six weeks before the 2008 U.S. presidential election.
More at Wikipedia.