Sharp drops in financial markets in China due to coronavirus

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On the first day of trading since markets opened after the Lunar New Year break, leading Chinese companies have had billions wiped off their value amid concerns about the impact of the coronavirus. We're in the US where candidates for the Democratic presidential nomination are racing around Iowa, ahead of the caucus on Monday. And how a crime boss in Kibera, Africa's largest slum, turned his life around and now helps young people move away from drugs and violence.