Inside Story - Why are South Africans angry with Jacob Zuma?

Political tension is on the rise in South Africa following the shooting of striking miners by police. Jacob Zuma, the South African president, has appointed a commission to investigate the circumstances that led to the deaths of more than 40 people during a wildcat strike at a platinum mine. Thirty-four of the dead were miners shot by police in a single incident. Some contend that Zuma's own political future hinges in part on successfully navigating this crisis. As, perhaps, does that of his ruling party, the ANC. Why is anger being directed at Jacob Zuma? And what impact is this having on the political standing of the ANC, which he leads and which has governed South Africa for nearly 20 years?