MANDELA / MADIBA L'ICÔNE HISTORIQUE
U.S. President Barack Obama, left, first lady Michelle Obama, under umbrella, and former President George W. Bush are greeted as they arrive at Waterkloof Air Base for a memorial service in honor of former South African leader Nelson Mandela on Tuesday, Dec. 10, 2013, in Centurion, South Africa. World leaders, celebrities, and citizens from all walks of life gathered for a memorial service on Tuesday to pay respects to Mandela. (AP Photo/ Evan Vucci)