Hillary Clinton arrived in Kenya a week ago at the start of her African tour - during which she is promoting better governance, human rights and trade - only to face journalists peppering her with questions about her husband's mission.

Bill Clinton secured the release of Laura Ling and Euna Lee, two journalists sentence to 12 years hard labour after being arrested on North Korean soil.

Secretary Clinton is in Congo on the fourth leg of her tour, which has taken in Kenya, South Africa and Angola. She is expected to visit Nigeria, Liberia and Cape Verde.