On this edition of Africa 54, Nigerian parents converge on a secondary school in the northwestern Katsina state, seeking information on hundreds of boys abducted by gunmen on Friday; Former Ghana president John Mahama says only if there is an inquiry on the presidential vote and it reaches a conclusion, will he accept defeat; The U.S. embassy in Khartoum says the White House has removed Sudan from the U.S. list of state sponsors of terrorism.