At the end of America’s southern border wall with Mexico, James Naughtie meets the people helping recently-arrived migrants survive in the extreme conditions. Beginning his day's journey at a church in Tucson, Arizona, James hears how members of the congregation support a programme helping migrants find work. And at the end of the border wall with Mexico, he meets recently-arrived migrants from around the world seeking asylum in the United States. He watches them being collected by Border Patrol for processing, and speaks to the humanitarian workers about what might happen to their claims for asylum.

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