In 1965 Martin Luther King led a march between the cities of Selma and Montgomery, Alabama USA. The marchers faced violence, intimidation and difficult conditions, but over the course of that 50 mile walk, thousands of people joined to raise awareness around the world and bring about huge changes to the rights of black people in the US.It was a walk that means a lot to presenter Radzi Chinyanganya. Growing up in Wolverhampton with a black father and white mother, Martin Luther King was his hero - and so to remember what those marchers achieved and to tell the story of what happened he'll be walking in the footsteps of those civil rights history makers.In a special edition he'll walk the same route, and along the way he'll be meeting some of those at the centre of what happened in 1965: Senator John Lewis, who led the marches, and is cited by Barak Obama as one of the inspirations behind his rise to become President of the United States; Sheyann Webb, who was just eight years old when she faced police brutality on the Edmond Pettus Bridge; and Reverend Fredrick Reese - reverend of the Selma church the march left from.Radzi will also be meeting some of the children whose life growing up in America has been affected by the civil rights movement, and find out what that part of history means to them. He'll be eating the same food, walking the same roads, and hearing the music that inspired them, to try and experience some of what those protestors experienced back then, to discover how what happened in one corner of Alabama has affected the USA today.Join him on his journey to discover the walk that changed the course of history - the walk that changed the world.