Plot Synopsis

GANG WORLD documents how America's most dangerous gangs started and evolved, letting criminals discuss their lives and showing how law enforcement does its best in a deadly, ongoing game of cat and mouse. This series is comprised of two, 60-minute episodes: "MS-13," which exposes how, after its humble beginnings by El Salvadorian refugees, this gang is one of the deadliest and fastest growing gangs in the U.S. and is locked in brutal territory fights with other gangs as they seek to expand; and "One Percenters," which uncovers the criminal culture of motorcycle gangs such as Hell's Angels, Mongols, and Outlaws -- all linked to countless beatings, kidnappings, and murders. Biography Channel aired the U.S. premiere of GANG WORLD on Wednesday, April 11, 2012 at 10pm ET.