In 2000, the USA agreed to take in some of the thousands of Sudanese children who'd become separated from their parents during a civil war in the south of the country.

The children - known as the Lost Boys - had been stuck in refugee camps for years.

Witness speaks to William Pay, one of the Lost Boys, and to Ann Wheat, the American volunteer who hosted him and many others.

The programme includes audio from the documentary Benjamin and his Brother (Courtesy of Documentary Educational Resources).