At least five people were arrested across the city after Barack Obama's rally in Grant Park, including a woman who slapped a Chicago police officer, saying police couldn't arrest her anymore, prosecutors said today. Most of the others celebrated the historic occasion with gunfire. Celita Hart, 19, stood silently in court today when she appeared for a bond hearing. Prosecutors said Hart, who is black, yelled " 'White [expletive], [expletive] McCain--you white police can't do nothing anymore.'" With that, she reached through the window of a squad car and slapped a white male officer in the face, according to Assistant...