Cosa nostra
The Sicilian Mafia has evolved into an international organized crime group. The Sicilian Mafia specializes in heroin trafficking, political corruption and military arms trafficking and is the most powerful and most active Italian organized crime group in the United States with estimates of more than 2,500 Sicilian Mafia affiliates located there. The Sicilian Mafia is also known to engage in arson, frauds, counterfeiting, and other racketeering crimes. It is estimated to have 3,500–4,000 core members with 100 clans, with around 50 in the city of Palermo alone.