In anticipation of the results of Nigeria's remarkably smooth presidential vote over the weekend, angry young men took to the streets across the country's mainly Muslim north on Monday with knives and clubs.

Despite the fact that international and domestic observers said this was the first relatively free and fair election since the tumultuous country moved beyond military rule 12 years ago, someone had convinced the mobs that the election had been rigged in favor of incumbent president Goodluck Jonathan, a southern Christian.

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