Robert Downey Jr. recently appeared on 'The Late Show with David Letterman,' to promote 'Avengers: Age of Ultron. During the interview, RDJ spoke briefly on 'Captain America: Civil War' and explained the concept of the film to a very confused Letterman. “There was a strain of comics where Captain America and Iron Man, they went … Continue reading Robert Downey Jr. Talks ‘Captain America: Civil War’