TODAY in the Wild: Keir Simmons teams with Nat Geo to explore African wilderness

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Introducing a new series: TODAY in the Wild! NBC correspondent Keir Simmons has been tracking the big cats of Africa, taking a close look at how humans and climate change have impacted their world. TODAY will roll out reports over the next nine months, working with National Geographic filmmakers, who have taken Simmons along for a guided tour throughout Africa.