Jefferson linked to Africa diamonds caseBy CAIN BURDEAU Associated Press Writer NEW ORLEANS --Rep. William Jefferson, facing a federal trial on corruption charges, has been linked to the prosecution of a former diamond executive in Botswana, opening a new window onto the congressman's dealings in Africa. The New Orleans Democrat and his family allegedly were the recipients of illegally funded trips to Botswana in 2001 and 2002, according to charges Botswanan prosecutors have filed against the former director of the Debswana Diamond Co. Ltd., a partnership between diamond giant De Beers SA and the Botswana government. Jefferson has not been...