Barack and Michelle Obama have sent their best wishes to Nelson Mandela on the former South African president's 95th birthday.
The US president and first lady said the world can honour Mandela by heeding his example and serving others.
The couple met the Mandela family last month on a visit to the former prison on Robben Island where the former leader spent 18 years in jail.
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The number of dead includes 35 civilians, according to reports.