A look at Climate Week NYC and the challenge of several developing nations who are facing the challenges of a changing climate without the support of the United States.
Dr. Peter Hotez and Dr. Michael Mann talk about the specific groups promoting anti-science and how they make fighting the global threats of disease and climate change harder.
Amy Maxmen reports on the Trump administration’s interference with the CDC, which slowed its response to a measles outbreak now recognized as America's largest in 30 years.