She took the defining picture of Putin’s war so far: a family killed by Russian troops as they tried to flee to safety. The US photojournalist, Lynsey Addario, has reported from almost every major conflict in the twenty-first century, and now she is on the ground in Ukraine, documenting suspected war crimes.

Lynsey Addario - who reported on the Taliban before most of the western world knew who they were - has borne witness to war, humanitarian disaster and the worst effects of climate change. She has been kidnapped twice, but still keeps returning to conflict zones.

Mark Coles profiles the award-winning photographer whose images continue to make the front pages.

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Producers: Sally Abrahams and Ellie House