What does the story of Cactus, Texas, tell us about the future of America as a nation of immigrants?

On the 30th anniversary of the fall of the Berlin Wall, Katy Long asks why political leaders are celebrating the occasion while building new border walls of their own.

Hosted by Academy Award-winning documentary film-maker Asif Kapadia (Amy, Senna, Diego Maradona), this is the last episode in a five-part series from BBC World Service in collaboration with Robert Redford’s Sundance Institute. Detours takes us off the main roads of our lives, following people who didn’t end up where they expected.

Katy Long tells the extraordinary story of what Bertolt Brecht called 'the most distinguished part of man's anatomy': the passport.

There's a growing number of people from Africa and Asia in Central America, whose hope one day is to make it to the United States. Katy Long dusts down her rusty French to speak to a man from Congo in the middle of a rainstorm in Costa Rica.

Katy Long argues that we should think differently about citizenship. She compares how citizenship and passports are bought and sold, and explores the ethical implications.