Violent storms claim lives and cost billions in damage in the US each year. Dateline travels with tornadochasing scientists as they try to understand and predict these extreme weather events.

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Watch more Dateline, SBS 9.30pm Tuesday, and on SBS On Demand.

Dateline is an Australian awardwinning international documentary series with a current affairs backbone.
Every week we transport you to a different part of the world to share halfhour stories about family, social injustice, identity, tragedy, redemption and survival. We scour the globe to bring you special characters and a world of daring stories.