Polls close in Zambia's presidential elections

On tonight's show: Polls close in Zambia after a much anticipated polling day. The presidential elections were preceded by unusual levels of violence but despite fears, Thursday went by pretty calmly. And South Africa pips Nigeria at the post to take the position of the continent's top economy. Finally, in Lesotho, residents living around one particular dam are faced with a drought and daily irony. The Katse dam's waters are destined for neighbouring South Africa.