WASHINGTON (Reuters) - President Barack Obama set out on an eight-day trip to Africa on Wednesday that is aimed at reviving U.S. engagement with the continent but that will be overshadowed by the uncertain health of South Africa hero Nelson Mandela.
Obama's trip, his second to the continent as president, will take him to Senegal, South Africa and Tanzania. While the president hopes to spotlight trade and economic development themes, his visit would be dwarfed if Mandela's condition takes a turn for the worse.
