Secretary of State Hillary Rodham Clinton embarks Monday on a seven-nation tour of Africa to affirm the Obama administration's commitment to tackling trouble spots across the continent from Somalia and Zimbabwe to the Democratic Republic of the Congo and Liberia, according to AP. Clinton kicks off the 11-day trip _ her longest overseas journey to date as the top U.S. diplomat _ in Kenya where she will address an African trade and development forum, meet top Kenyan officials and see the beleaguered president of lawless Somalia's interim government. Kenya is struggling to overcome political and tribal divisions laid bare in early 2008 after disputed elections between the incumbent President Mwai Kibaki and opposition leader Raila Odinga. Obama, on a visit to Kenya in 2006, had urged Kenyans not to let those differences mar their democratic development, and U.S. officials say Clinton will repeat that message with Kibaki and Odinga, who became prime minister in a power-sharing deal that ended the crisis. Clinton then travels to South Africa, where she will urge President Jacob Zuma's government to do more to press neighboring Zimbabwe, in the throes of economic crisis, to fully implement a political pact between President Robert Mugabe and former opposition leader Morgan Tsvangirai. In Pretoria, Johannesburg and Capetown, Clinton will also underscore the importance of efforts to combat HIV/AIDS and pledge continuing U.S. backing for health care initiatives in Africa, some of which have been led by her husband's private foundation. Clinton will then visit oil-rich Angola, one of southern Africa's largest energy producers and a major supplier of crude and national gas to the U.S. market. Angola has in recent years been courted by China, and Clinton's trip there is intended to strengthen its ties with the U.S. From Angola, Clinton heads to the Democratic Republic of Congo, which has been wracked by violence since genocidal forces from Rwanda fled into its eastern mountains 15 years ago. At its height, the conflict involved half a dozen of the country's neighbors. After Congo, the secretary will move on to Nigeria, another major U.S. energy supplier. Clinton's last stop will be Cape Verde, a group of nine small islands off Senegal with a population of less than half a million that is often hailed as a success story for African democracy despite its lack of natural resources.