Extreme Heat, Social Media Warnings, Juneteenth Homecoming, a Farewell to Dr. Jen

In this week's episode: a conversation about the extreme heat and the changing climate, a new call to include warning labels on social media, a homecoming for a 97-year-old Juneteenth activist, and a look back at Dr. Jennifer Ashton's 13 years at ABC News. Learn more about your ad choices. Visit podcastchoices.com/adchoices