Muhammadu Buhari, who is receiving medical treatment for an undisclosed illness in England, also angered some by speaking in Hausa, not English
This is the first time in three weeks Buhari attends prayers after missing three consecutive Wednesday cabinet meetings
Calls come day after president suspends officials accused of illegally acquiring millions
Nigerian defense minister notes it took a long time for US to find bin Laden
Despite claims by Nigerian military that tide had turned, Islamic militant group has continued its campaign of terror
