What Was The Apalachin Meeting in 1957?

On Nov. 14, 1957, 59 years ago today, New York state troopers noticed a suspicious number of expensive cars with out-of-state license plates converging on the small town of Apalachin. The cars, it turned out, belonged to Mafia leaders from across America, who had come to Apalachin for a national summit meeting. The aftermath of the Apalachin Meeting would shed new light on a criminal organization that greatly valued its secrecy. It also forced the FBI to admit once and for all that the Mafia operated on a nationwide scale.
http://mafia.wikia.com/wiki/Apalachin_Conference
https://youtu.be/mkQZo-CzxeE