Japanese troops in South Sudan for first overseas deployment since WWII

On tonight's show: Japan joins the UN peacekeeping mission in South Sudan. For the first time since World War II, the Japanese troops have the green light to use force if necessary. Also, brake failure is to blame for last month's deadly train crash in Cameroon. That's according to newly-uncovered documents amid an ongoing investigation - we bring you an exclusive report. And Rwandan cyclist Valens Ndayisenga takes home his second "Tour du Rwanda" title.