Buhari sack NSA, service chiefs. President Muhammadu Buhari has sacked the National Security Adviser, NSA, Col. Sambo Dasuki, (retd) and other service chiefs. "The President has relieved the service chiefs, including the heads of the army, air force and navy of their appointments,"Femi Adesina told newsmen, adding that replacements would be announced soon. The sacked chief are; Alex Badeh, Chief of Defence staff; Usman Jibrin, Chief of Naval Staff, Kenneth Minimah, Chief of Army Staff and Adesola Amosun, Chief of All Staff.