Miami's Liberty City is football's Mecca, home to NFL legends. But the biggest rivalry in this city isn't exactly big–it all starts with a hard-hitting squad of 6 year-olds.Sport is conflict, but rivalry is a way of life, and it goes beyond the game. From Argentina's infamous soccer stands to Miami's troubled inner city, VICE World of Sports unearths a series of rivalries that redefine the meaning of the word.