CHICAGO - AUGUST 11: Brad Pitt and Angelina Jolie visit The Field Museum with their children on August 11, 2007 in Chicago. (Photo by James Devaney/WireImage)
CHICAGO - AUGUST 11: Brad Pitt and Angelina Jolie visit The Field Museum with their children on August 11, 2007 in Chicago. (Photo by James Devaney/WireImage)