Photos: People gather outside Shell HQ in London to commemorate the 20th anniversary of the execution of Ken Saro-Wiwa

Activists, artists, Movement for the Survival of the Ogoni People (MOSOP) and Action Saro-Wiwa gathered this morning, November 10, outside Shell Headquarter in London to mark 20 years since the execution of Ken Saro-Wiwa and 8 other Ogoni leaders for their protests against Shell's destruction of their environment which led to the deaths of four Ogoni chiefs.