Oliver Peterson: Australian correspondent on Peter Costello resigning as Nine Entertainment chair following alleged assault

Former federal treasurer and Nine Entertainment chair Peter Costello has resigned after he was accused of assaulting a journalist at Canberra airport. Costello was accused of pushing a News Corp journalist after he refused to answer questions about the embattled media company. Australian correspondent Oliver Peterson says Costello has denied the assault and claimed the journalist fell over. LISTEN ABOVESee omnystudio.com/listener for privacy information.