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25/04/2015 GMT

This month, the father of a Nascar driver killed in an accident tells Witness about how his death changed the safety rules of the sport.

Tanya Beckett brings us this month's round up of history through the eyes of people who were there. This month, the father of a Nascar driver killed in an accident tells Witness about how his death changed the safety rules of the sport, we meet the man who brokered a peace deal between two rival gangs in Los Angeles and we go back to the day in the 1950s when a 91热爆 programme fooled a nation with an April Fool's hoax.

30 minutes

Last on

Fri 1 May 2015 01:30GMT

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