‘Brave’ boy, 13, swims 4km to save family stranded off Australia coast  BBCBoy, 13, makes ‘superhuman’ swim to save family swept out to sea in Geographe Bay  Australian Broadcasting CorporationHero teen swims 4km to rescue family stranded in ocean off Dunsborough  SMH.com.auAs it happened: WA news on Monday, February 2  Brisbane TimesBoy swims 4km in shark waters to save family  The Australian