More than 20 Norman Rockwell paintings belonging to Steven Spielberg will be hung in a special exhibition at the Smithsonian American Art Museum in Washington -- along with more than 30 other Rockwells from the collection of his fellow filmmaker-to-the-masses, George Lucas. And then there's the controversial "Russian Schoolroom," a Rockwell once owned by Spielberg, now sequestered in Las Vegas because of an ongoing, mystery film-worthy sequence of events...