By Lizzy Okoji Prof. Ibrahim Gambari, Chief of Staff to President Muhammadu Buhari, says Nigeria must promote its national interest positively to be accepted globally. Gambari made the call on Saturday in Abuja at the book launch of a Nigerian Former Ambassador, Mohammed Ibrahim titled “With Heart and Might: 33 Years In the Nigerian Diplomatic Service.” The News Agency of Nigeria (NAN) reports that the book, a memoir of Ibrahim’s life as a Foreign Service Officer highlights some of the challenges in the Foreign Service, Nigeria’s Foreign policies with recommendations for improvements. Gambari …