NEW YORK (AP) - Brad Pitt wanted "World War Z" to be a PG-13 so families could see it together. He says his 11-year-old son Maddox and 9-year-old son Pax were old enough to see it and "loved it." Even though the rating suggests that the movie's for kids 13 and older, Pitt says it's up to the parent to decide if their kids are old enough to see the movie. He says "it's called parental guidance." Pitt describes World War Z as "the most intense thing you're gonna see" this summer. It opens today.