The Security Council is the United Nations' most powerful body, with the ability to impose sanctions and authorize the use of force. There are five permanent members of the council: Russia, France, China, the U.S and Britain. And any one of those permanent members can veto council resolutions. The U.S. is proposing expanding the number of permanent members, including two permanent seats for African countries. We talk to the U.S. Ambassador to the U.N. about the proposal.

And Seoul, South Korea is such a massive city, residents looking to experience nature can face a long journey to reach the countryside. As a result, the city's parks are catering to urban campers who want to sleep outdoors closer to home. We meet some of them.

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