Submitted: Jul 8, 2008 - Brad Pitt and son Pax, 4, visited Angelina Jolie at the Lenval Hospital in Nice, France Tuesday. Jolie, pregnant with the couple's twins, has been staying at the hospital as a precaution since the last weekend in June. (See 15 pics of her bump.) Pax wore a Kung Fu Panda shirt – a shout-out to his mom's summer blockbuster. Last week, Jolie's obstetrician, Dr. Michel Sussmann, held a press...