United States President Barack Obama, left, waves to crowd while departing from the Nelson Mandela Foundation in Johanesburg, South Africa,Saturday, June, 29, 2013. Mandela whose condition has improved according to the Presidency, but remains in critical condition in a hospital in Pretoria. (AP Photo/Tsvangirayi Mukwazhi)

Associated Press
United States President Barack Obama, left, waves to crowd while departing from the Nelson Mandela Foundation in Johanesburg, South Africa,Saturday, June, 29, 2013. Mandela whose condition has improved according to the Presidency, but remains in critical condition in a hospital in Pretoria. (AP Photo/Tsvangirayi Mukwazhi)
United States President Barack Obama, left, waves to crowd while departing from the Nelson Mandela Foundation in Johanesburg, South Africa,Saturday, June, 29, 2013. Mandela whose condition has improved according to the Presidency, but remains in critical condition in a hospital in Pretoria. (AP Photo/Tsvangirayi Mukwazhi)
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