What if history had been different? Houston Chronicle Copyright 2012 Houston Chronicle. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 1:57 p.m., Monday, November 12, 2012 Once events happen, they can't "unhappen," yet it is human nature for us to ask, "What if?" Oliver Stone has asked the question through much of his film work over the years and asks it again in the first four films in his 10-part documentary series, "The Untold History of the United States," premiering Monday on Showtime.