Nigeria, Dec. 3 -- As we patiently waited with others for the elevator to arrive on the ground floor of the Nigerian Mission to the United Nations in New York this September morning (only one of the elevators was working!), a few people who recognised him seemed to gasp as they realised that such an eminent global citizen and former head of the Mission was standing there unassumingly. That was Ibrahim Agboola Gambari, global diplomat, statesman, retired professor of International Relations, ex-Under Secretary-General (Political) of the United Nations, ex-External Affairs Minister, ex-Nigeria's Permanent Representative to the United Nations, immediate past Chief of Staff to the President, Ilorin prince, gentleman extraordinaire, and one of...