Trailers Weekly: “The Secret Life of Walter Mitty”, “47 Ronin”, “Charlie Countryman”, “American Hustle” Michael Lee, October 12, 2013 Trailers Weekly is a feature in which we bring you the most popular and talked about trailers of the week. Sharing trailers is a classic viral practice, and trailers are still the most mainstream way for people to learn about movies. We’ve got trailers from Secret Life of Walter Mitty,…