President Muhammadu Buhari has approved the following appointments: Major-General Abayomi Gabriel Olonishakin – Chief of Defence Staff; Major-General T.Y. Buratai – Chief of Army Staff Rear Admiral Ibok-Ete Ekwe Ibas – Chief of Naval Staff Air Vice Marshal Sadique Abubakar – Chief of Air Staff Air Vice Marshal Monday Riku Morgan – Chief of Defence…