It is the 20th anniversary of the execution of Ken Saro-Wiwa, who campaigned against oil pollution in the oil rich Niger Delta by Royal Dutch Shell.
He was sentenced to death after being found guilty of involvement in four murders - in a case condemned as a sham and after international appeals for clemency.
Al Jazeera's Yvonne Ndege has been to meet his widow in Ogoni - who is proud of his fight against Royal Dutch Shell and for democracy.
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