Nevermind Superman's sexual orientation. Here's another identity-related question that is likely to spark controversy as the Man of Steel soars into theaters nationwide this Fourth of July weekend in Warner Bros. Pictures' "Superman Returns": Is Superman still American? Ever since artist Joe Shuster and writer Jerry Siegel created the granddaddy of all comic book icons in 1932, Superman has fought valiantly to preserve "truth, justice and the American way." Whether kicking Nazi ass on the radio in the '40s or wrapping himself in the Stars and Stripes on TV during the Cold War or even rescuing the White House's flag...