DURHAM - The robber was holding a gun to 5-year-old Mary Long's head when a 3-foot-tall Mighty Morphin Power Ranger leapt into the room. "Get away from my family," 4-year-old Stevie Long shouted, punctuating his screams with swipes of his plastic sword and hearty "yah, yahs." The robber and his accomplice, who was waiting outside the apartment Friday night, fled with credit cards, jewelry, cash and other items that Stevie's mother, Jennifer Long, dumped from her purse. "I scared the bad guys away," Stevie said Tuesday evening at the apartment ...