In tonight's edition: Three children are among 17 people killed in a toxic gas leak on the outskirts of Johannesburg. Authorities suspect that equipment used by illegal gold miners is linked to the accident. We also speak about Africa's energy…

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In South Africa, at least 16 people have died from a toxic gas leak in a settlement on the outskirts of Johannesburg. The deaths are thought to have been caused by a leaking cylinder of nitrate gas -- a gas…

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