Dr. Sanjay Gupta digs down on climate change and your health. Did you ever wonder why you seem to be sniffling; maybe your allergies won't go away? Tune in for a conversation with a doctor who has a fascinating answer. Plus, good news on cancer rates: They're on their way down, but there are some caveats. And, you’ve heard of the bionic man -- now it's not just a fantasy. There is a body part out there that can now be bionic. We’ve got that amazing story. All this, the latest headlines, and what doctors are hoping to find scanning the brains of children with Autism.