Walt Disney, which refused to distribute Michael Moore's controversial Fahrenheit 9/11, is using the Fourth of July holiday to launch a feelgood feature film about the American people. Borrowing a tactic from the grassroots campaign that made Mel Gibson's The Passion of the Christ a surprise hit, the media giant has used early screenings for select groups and is encouraging people to "spread the word" about the patriotic film, with invitations, posters, and guidelines for group outings on its website. America's Heart & Soul, which opens today on 100 screens across the US, offers a flag-draped look at the country....