clinton has alsoeen in angola, whe she praised steps that country has taken toward democracy. shrefused to comment on what is seen as a gwing rivalry for influence inhat oil-rich cotry between the united states and china. >>> and in tight's signature stor we want to take another look at the increasingly important trade relationsh between china and afca. china recently surpassed the unit states as africa's biggest ading partner to the tune of $107 billion lasyear. that's a remarkable teold increase justhis decade. some of this trade does inlve untries such as angola, suda zimbabwe, which ve been implicat in human rights abuses. but as "worldfocus" specia correspondent mart seemungel first repoed last year from kenya and tanzania, cha's influence is much broader. >> reporter: these young kenyans already eak english. aegacy of the british emfire africa but now they have decided learn -- chinese. this is theconfucus institute nairobi university. for these stents taking chinese is, as they say, no-brainer. >> this language is important. because of eir -- because china growi so much