[The Conversation Africa] Kenya has scores of youth gangs known for their violence and links to the politically powerful. None is more infamous than the Mungiki movement, with a past membership estimated to be at least a million. Though banned, it's constantly in the news as a tool or target of big political players. Bodil Folke Frederiksen, who has studied Mungiki as part of her field-based research on youth culture in Kenya, traces the origins, growth and persistence of the group.