The measles virus is still spreading, and tight-knit communities are more vulnerable than others. We’ll explain why -- and tell you what’s being done to help. Also: Trump’s not the only GOP candidate in the 2020 race anymore. We’ll tell you why primary contenders can make things messy. Also on today’s episode: climate change protesters in London are getting arrested, and a new study explains why we’re all so distracted. Wait, what?
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