Nigeria: A look at the life of Nigeria's Umaru Yar'adua

Nigeria's president Umaru Yar'adua has died after a long illness.

He had been out of office since November last year, when he was flown to Saudi Arabia for medical treatment.

Yar'adua returned to the Nigerian capital in February, but never appeared in public.

Al Jazeera's Yvonne Ndege looks back at his life.

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