Conflict in Africa’s Sahel region is the biggest threat to saving lives in one of the poorest places on earth, according to the UN aid chief in charge there.

Robert Piper, who’s UN Regional Humanitarian Co-ordinator for Sahel, said that in the last 12 months alone, more than one million people have been displaced by fighting in countries including north-east Nigeria and northern Mali.

In an interview with Daniel Johnson, the aid chief said that chronic structural problems still hamper development in the nine-country region, which is home to 145 million people and where 1.2 million children die every year – half of them from malnutrition.

Duration: 4'36"