HAMBURG, Germany (Reuters) - The balding young man with the black beard raised his hands to cover his face as three visitors entered the room. Abdelghani Mzoudi is no stranger to the world's front pages and television screens after a six-month trial that saw him acquitted this year of aiding and abetting the Sept. 11 attacks on the United States. But he does not like to be recognized, still less to speak to the press. In a drab canteen at Hamburg's Al Quds mosque, housed in an anonymous grey-tiled building with a fitness club on the ground floor, the 31-year-old...