Fifty years ago today, police raided a small farm near Johannesburg, South Africa.
Nelson Mandela was already in prison, but police seized other top leaders of the African National Congress' military wing.
They also found evidence that eventually led to a life sentence for Mandela. Of course, Mandela was eventually released and became president of his country.
Now, as Mandela remains in critical condition in a Pretoria hospital, the BBC's Mike Wooldridge reports on what happened on July 11, 1963.
This segment aired on July 11, 2013.