 By Alvise Armellini ROME Reuters - Matteo Messina Denaro, a brutal Sicilian Mafia boss who was Italys most wanted criminal before his capture on Monday, had been on the run for 30 years. Here are some key facts about his arrest and what it means: WHY IS THE ARREST SO IMPORTANT? Messina Denaro, 60, was the last runaway member of a generation of mobsters who masterminded a string of bombings and murders that terrorised Italy in the early 1990s. His arrest finally brings closure to that dark era... 