"What's up with your shirt?"Those are the words a former senior at Fleming Island High School remembers hearing as he walked from his fifth-period algebra class toward the gym. The 18-year-old, who is not being identified due to his family's concerns of safety, had just taken off his Dixie Outfitter T-shirt, exposing a highly offensive shirt. "What about it?" replied the 18-year-old, skinny and white. "Well, you know it's racial," said a black student, now in a group confronting the 18-year-old. "Yeah. So?" The undershirt the white student wore had a confederate flag on the front with the words "Keep...