Nigeria's newly sworn-in president has said the troubled Niger Delta will receive his "urgent attention".In his inaugural speech, Umaru Yar'Adua called for an end to violence in the oil-rich but under-developed area which has led to a 25% cut in oil production.
He also admitted shortcomings in the election that brought him to power, which has been widely condemned.
The inauguration marks the first time in Nigeria's history that one civilian leader has taken over from another.
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