It's one of the biggest games in the Italian football season and hundreds of Inter Milan "ultras" are ready to fight. There are no rules except one: you can use fists, rocks, knives but not guns ...

Among those awaiting trial are Renato Bosetti and Luca Lucci, the two heads of the Inter and Milan ultras when they were arrested back in September. Bosetti took control of the "Curva Nord ...