U.S. President Obama and first lady Michelle are greeted by Senegal President Sall and his wife Mariame at Presidential Palace in Dakar

U.S. President Barack Obama (2nd R) and first lady Michelle Obama (L) are greeted by Senegal President Macky Sall (2nd L) and his wife Mariame at the Presidential Palace June 27, 2013 in Dakar, Sengal. Obama’s trip, his second to the continent as president, will take him to Senegal, South Africa and Tanzania. REUTERS/Gary Cameron