chunk: Despite a clampdown by the authorities, the Five Families erupt in open warfare and Vito's sons fear for their safety. Michael takes refuge in Sicily, and his brother, Fredo, is sheltered by the Corleone's Las Vegas casino partner, Moe Greene. Sonny attacks his brother-in-law Carlo on the street for abusing his sister and threatens to kill him if it happens again. When it does, Sonny speeds to their home, but is ambushed at a highway toll booth and riddled with submachine gun fire. While in Sicily, Michael meets and marries Apollonia Vitelli, but a car bomb intended for him takes her life.