U.S. Secretary of State Hillary Clinton meets with Senegal's President Macky Sall (L) at the Presidential Palace in Dakar August 1, 2012. Clinton arrived in Senegal on Tuesday, beginning a trip that will take her both to Africa's newest nation South Sudan and on a private visit to the continent's elder statesman, 94-year-old anti-apartheid leader Nelson Mandela. REUTERS/Jacquelyn Martin/Pool (SENEGAL - Tags: POLITICS)