One Nation leader Pauline Hanson has detonated a political grenade at the National Press Club, declaring Australia "cannot be a multicultural society" and must become "monocultural" under one cultural umbrella. In a fiery 51-minute debut address after 30 years in politics, Hanson pledged to axe SBS, overhaul the ABC with a metropolitan licence fee, slash immigration to ease the housing crisis, and target what she called Islamic extremism. The speech was interrupted by a...