Swaziland King Mswati III arrives to attend the inauguration of new Nigerian President at the Eagles Square in Abuja, on May 29, 2015. Mohammadu Buhari, 72, defeated Goodluck Jonathan in March 28 elections -- the first time in Nigeria's history that an opposition candidate had beaten a sitting president. AFP PHOTO  / PIUS UTOMI EKPEI        (Photo credit should read PIUS UTOMI EKPEI/AFP via Getty Images)