LONDON (AFP) - Former UN secretary general Kofi Annan was named as the chairman of the six-person committee that will judge the world's biggest prize on Sunday, awarded to departing African statesmen for promoting good governance. Annan will be joined on the committee for the annual Mo Ibrahim Prize for Achievement in African Leadership by the UN Special Envoy for Kosovo Martti Ahtisaari, former UN high commissioner for human rights Mary Robinson, and the Special Adviser to the Director-General of UNESCO, Aicha Bah Diallo. Also on the committee are Ngozi Okonjo-Iweala, the former finance and foreign minister of Nigeria, and...