Former Minister under Goodluck Jonathan administration, Diezani Alison-Madueke, aged 63, who also served as president of the Organization of the Petroleum Exporting Countries (OPEC), was a key figure in the
Former Minister under Goodluck Jonathan administration, Diezani Alison-Madueke, aged 63, who also served as president of the Organization of the Petroleum Exporting Countries (OPEC), was a key figure in the