INEC chairmen since 1999: who ran Nigeria's elections
Six people have led the Independent National Electoral Commission in the Fourth Republic. Their tenures tracked Nigeria's best and worst elections.
The 2011 presidential election: a better-run vote, followed by deadly violence
Goodluck Jonathan won with 58.9% in what observers called a significant improvement on 2007, but riots across 12 northern states killed more than 800 people.