Surfers' illness and initial observations

It was one of the worst environmental disasters to strike Australia’s oceans. 

When a massive algal bloom arrived in South Australia, devastating the coastline and killing marine life, the public was initially told it wasn’t toxic, when it later became apparent it was.

Today, Four Corners reporter Angus Grigg on his investigation into what the South Australian government knew and whether it acted fast enough.

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Angus Grigg, Four Corners reporter