The grandson of the last surviving African-born US slave, plus the story behind the portable hospital breathing ventilator that was a precursor to those helping save coronavirus lives; also on the programme the Pakistani welfare hero, the deadly explosion which sent 130 million gallons of oil into the Gulf of Mexico, and candid insights from one of America's greatest playwrights.
Podden och tillhörande omslagsbild på den här sidan tillhör BBC World Service. Innehållet i podden är skapat av BBC World Service och inte av, eller tillsammans med, Poddtoppen.
