Remembering John McCain in Vietnam and his immigration legacy, and climate change and nutrient deficiencies

In Vietnam, the media have put out tributes to John McCain who died on Saturday. Even some ordinary citizens have laid flowers at the lake where he crash landed in 1967. Listen for more on how McCain is being remembered in Vietnam. Plus, McCain's views on immigration and how his passing could influence future immigration debates. And, how climate change could end up making the food we eat less nutritious.