Sydney is still reeling from two brutal stabbing incidents. As leaders call for unity and peace, attention turns to the power of social media companies to stop the spread of rumour and lies. Plus nuclear energy on the agenda. Panellists: Minister for Emergency Management and Agriculture Murray Watt, Nationals Senate Leader Bridget McKenzie, NSW Leader of the Opposition Mark Speakman, Pastor & CEO, Wayside Chapel Jon Owen and Professorial Fellow in Sport, University of Canberra, Tracey Holmes.