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Vietnamese Foreign Minister Pham Binh Minh is in Pyongyang to discuss the details for the second Trump-Kim summit. While denuclearization will be the main topic of the meeting between Trump and Kim, DPRK seems to be facing another problem – food insecurity. A report from the UN says that over 10 million people – more than 40 percent of the country's population – are currently affected by the problem. CGTN guest Yang Xiyu shares his insights.