How did the US Supreme Court become so powerful?

Joshua Rozenberg hears the story of the extraordinary case that rewrote the way America is governed - giving the Supreme Court the power to overrule Congress. He discovers what American prosecutors get up to behind the closed doors of the grand jury room. And he asks whether we should be screening jurors in England and Wales for bias before they are allowed to serve on rape trials. Producer: Neil Koenig Researcher: Diane Richardson