The first full trailer for Kevin Costner's 'Horizon: An American Saga' is here. The project is a wildly ambitious, four-part post-Civil War Western epic. Costner co-wrote, directed and stars in it. During a moderated discussion about the 'Horizon' trailer, Costner said of making the Western, "These are real lives. People just making their way, women just trying to keep their families clean and fed…I'm drawn to that. I'm always gonna get to my gunfight, but I'm drawn to the little things that people had to endure."