Duration: 30 minutes
With the earthquake in Haiti and the floods in Pakistan, 2010 has seen the biggest humanitarian effort in history.
Aid agencies warn that patterns of climate change, war and urbanisation will produce ever more challenging crises in future. Valerie Amos is the newly appointed Head of the United Nations Office for the Coordination of Humanitarian Affairs.
Carrie Gracie asks her if the United Nations aid effort is fit for purpose or is being increasingly driven by politics.