Listen to the highlights of two special programmes presented from Washington to mark the 50th anniversary of Dr Martin Luther King’s ‘I Have a Dream’ speech.

Dotun Adebayo discusses Dr King’s legacy and the impact of the speech which has become a defining moment in the history of the American civil rights movement.Guests include the King family friend Juanita Abernathy, the cousin of Emmett Till whose death sparked civil rights protests, the mother of the murdered teenager Trayvon Martin and the daughter of George Wallace, one of America’s most famous segregationists.