Photographer Sergey Ponomarev won 2016's Pulitzer Prize for his work, along with colleagues from the New York Times, in documenting the European refugee crisis.
Over the course of five months he followed refugees across Europe, recording their border crossings and struggles to reach their destinations.
His approach to the project, called The Exodus emphasised the human struggleof the refugees, who were fleeing from Syria and other countries.
'It's kind of a matter of their reception of you, that you are not going to be the journalist who just arrived, made several clicks for two hours and then left and slept in his fancy hotel and they continue to stay in the mud,' he said.
'You know because for those journalists people wouldn't tell their stories, they would probably say something basic but if you want to bring a real story, you need to put yourself on the same level and in the same circumstances with others.'
The Exodus is on show at IWM London as part of Sergey Ponomarev: A Lens On Syria,which forms part of IWM's Syria: A Conflict Explored, a season of exhibitions and events reflecting upon the ongoing conflict in Syria.