It is said that everyone in New Zealand knew someone, or knew someone who knew someone, killed when an Air New Zealand Antarctic sightseeing flight crashed into Mt Erebus 30 years ago on Saturday. Picton sisters Susan O'Rourke and Melanie Fishburn have a closer connection than most - they lost their mother. They share their story for the first time.

Susan O'Rourke was watching television one night almost 30 years ago when she heard 10 words she has never forgotten – a plane is overdue from a sightseeing trip in Antarctica.