“Unbroken”, a film Angelina Jolie directed about the plight of an American Olympian turned World War II prisoner, helped her tackle motherhood. Based on a best-selling book by Laura Hillenbrand, the film tells how Louis Zamperini, an Olympic sprinter, spent 47 days on a life raft after his plane crashed into the Pacific, and was then held for two years by the Japanese.Jolie said “The strength of a strong heart and an indomitable will is valuable and it’s worth something.