Obama plan to 'Power Africa' gets off to a dim start

US President Barack Obama

Barack Obama last year told a cheering crowd in Cape Town that a $7 billion plan to "Power Africa" would double electricity output on the world's poorest continent and bring "light where currently there is darkness".

A year later, the U.S. president's flagship project for Africa has already achieved 25 percent of its goal to deliver 10,000 megawatts of electricity and bring light to 20 million households and businesses, according to its annual report.