Iron Man 3 is a superhero in China's box office

Disney's Iron Man 3 film is set to become China's highest-grossing movie of all time, making a record-breaking $65m in its first weekend. The Marvel Comics-based storyline sees Robert Downey Jr. continue his success as superhero Tony Stark. As Samira Hussain reports, the Chinese market is now a vital part of the business plan for Hollywood studios.