Photo journal: Roadside chef

Mary Uduru is one of the many Nigerians struggling to live on less than $1 a day, despite the country's vast oil wealth.

Some Nigerians hope their lives will be easier after April's elections.

Mary works from dawn to dusk cooking and selling food on the roadside in the small central town of Makurdi.

Her husband died when she was 26, leaving her to bring up her four children alone. She now cares for three of her grandchildren.