A new documentary on aid workers in war zones shows the tough choices, dilemmas and limits faced by doctors providing emergency care in extreme conditions.

Shot in 2005-2006 and presented at the Venice film festival, "Living in Emergency" follows four Western volunteers working in Africa for Doctors Without Borders (MSF), the French-based aid agency which won the Nobel Peace Prize in 1999.

Two are new recruits and two are experienced field workers in Liberia after its brutal civil war and in the lawless northeast of the Democratic Republic of Congo. All struggle to cope with a crushing work load, the lack of adequate supplies, and the chaos and carnage around them.

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