Ribadu and Trump: A Lesson in Security Diplomacy, by Hassan Gimba The Arbiter  Two weeks ago, in what may aptly be termed security diplomacy, Nuhu Ribadu—the super cop who proved his mettle as a corruption-fighting czar and now serves as National Security Adviser—brought all his experience, and more, to bear on the task of dousing the fire threatening to engulf us from the guns of a ‘trigger-happy’ Donald Trump.The outcome of that effort, a delicate exercise akin to shuttle diplomacy, has offered Nigeria a new lease of life and renewed global...