>>> tonight on "worldfocus." >> tonight on a specl edition of "worldfocus," an eye-opening look at 21st century africa. visit with africa's rising middle class. so many africans are climbing the social ladder, maybe upward mobility should be called the african dream. >>> find out why the humble cell phone has become the one thing africans can't live without, revolutionizing life in the process. >>> and come along to rwanda, ground zero of an ambitious plan to get inexpensive laptops to young students around the world. >>> from the different perspectives of reporters and analysts from around the globe, this is "worldfocus." major support has been provided by rosalind p. walter, and the peter g. peterson foundation, dedicated to promoting fiscal responsibility and addressing key economic challenges facing america's future. and additional funding is provided by the following supporters. >>> welcome to "worldfocus." i'm daljit dhaliwal in new york. as many of you know, a regular feature here on "worldfocus" has been our "signature stories." reports filed by our own staff members who have tr