Five Mafia families ruled New York with a bloody fist in the 1970s and '80s, until a group of federal agents tried the unthinkable: taking them down.Five Mafia families ruled New York with a bloody fist in the 1970s and '80s, until a group of federal agents tried the unthinkable: taking them down.Five Mafia families ruled New York with a bloody fist in the 1970s and '80s, until a group of federal agents tried the unthinkable: taking them down.