Rob Reiner has directed many great films like "The Princess Bride", "This Is Spinal Tap", "Stand By Me", and "A Few Good Men". His latest film is in his words "the most personal film he's ever made". "Being Charlie" was co-written by Reiner's son Nick who, like the main character in the film, has battled his way through addiction with the help of his family. So Reiner knows the subject very well. Here he talks about what he went through with his son and how it helped him become a better father.