Trump meeting in China to address tech, Iran war and Taiwan

US President Donald Trump arrived in Beijing today for talks with Chinese counterpart Xi Jinping. The two leaders are expected to discuss their countries’ tech rivalry, the Iran war and the future of Taiwan. Also, a conversation with award-winning journalist Ann Curry about the  conflicts in Sudan over the years. And, a look at New England’s white pine trees, once a strategic resource for Britain's Royal Navy. Plus, a network of around 2,000 volunteers help to rescue migrating baby turtles in South Africa.