Nigeria heads to the polls

JOHANNESBURG - On Saturday Africa's most populous country will be heading to the polls.

Millions of young people are set to cast their ballots.

READ: Nigeria's top female presidential hopeful quits race

But the candidates are very much part of the established order.

Nigeria's Muhammadu Buhari is running for president again. He’ll be facing off with his opponent Atiku Abubakar.

Between the two, they’ve run for office nine times.

READ: Nigeria vice president survives chopper crash 

International observers and civil society groups say they're concerned.

They fear election interference and rigging.