Monday Headlines: 

• One Nation becomes most popular political party in Australia
• Defence Minister reveals changes to AUKUS pact
• Searches continue in flooded Laos cave for missing miners
• Australian house prices fall
• Socceroos lose friendly as countdown to the World Cup hits two weeks

Deep Dive: The government last week launched its biggest lawsuit ever: Australia is suing the US corporate giant 3M for $2 billion, alleging that 3M concealed the fact that its firefighting foam was harmful.  

3M's firefighting foam was made from PFAS chemicals, which scientists now say are environmental contaminants, and the government is seeking damages for the contamination of 28 military bases around Australia. 

In this episode of The Briefing, Chris Spyrou is joined by Ian Wright, Associate Professor in Water Science at Western Sydney University, to unpack what we know about PFAS and whether the Commonwealth's case goes far enough. 

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