Can this woman shake up Nigerian politics?

Obi Ezekwezili is well known in Nigeria for leading the #BringBackOurGirls campaign to help free the 276 girls kidnapped from Chibok, northern Nigeria, in 2014. She has also served as the country's education minister and vice-president of the World Bank.

She's now decided to run for President, but has she got any chance against incumbent President Muhammadu Buhari, or opposition candidate, Atiku Abubakar - who both have formidable party machines behind them?

(Photo: Obi Ezekwezili speaking about the 'Bring Back Our Girls' campaign. Credit: Reuters)