MILAN (Reuters) - A group of suspected Islamic militants arrested in Italy and Belgium may have been planning an attack on NATO headquarters or the European Parliament, Italian newspaper Corriere della Sera said on Wednesday. Quoting Italian investigators, Corriere said a suspected planner of the Madrid bombings in March -- among those arrested on Tuesday -- had intended to travel from Italy to Belgium possibly to take part in an attack on a "symbolic" target. Rabei Osman Sayed Ahmed, known as "Mohamed the Egyptian," was seized on Tuesday with a fellow suspect in Milan, and Belgian police, acting on information...