Australia news live: shark-spotting drones to patrol NSW beaches year-round; Chalmers grilled on ‘widow’s tax’

New South Wales is launching year-round drone patrols to spot sharks before they reach swimmers — an expansion Premier Chris Minns says is the world's largest aerial shark surveillance system. In separate news, Australia's government is cracking down on tech companies over compliance with its social media age restrictions, doubling financial penalties and giving the eSafety Commissioner tougher enforcement powers.

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