Half a world away from the Strait of Hormuz, Australian families are discovering once again that the price of peace in distant regions is paid at the petrol pump. Fresh Houthi strikes on Saudi oil infrastructure and a near-collapse of US-Iran diplomacy have pushed Brent crude above $108 a barrel, sending a tremor through global energy markets that had only recently found their footing. For a country that imports its fuel and exports its vulnerability to geopolitical shock, Australia now faces the prospect of petrol prices climbing toward levels not seen since the first strikes on Iran earlier