What if your dog could talk? Georgia Tech researchers have developed a vest that can help service dogs communicate. Melody Jackson leads the initiative, and she’s the director of Georgia Tech’s Center for BioInterface Research. We talk about canine communication with her, and with Greg Berns. He directs the Center for Neuropolicy at Emory University, and is author of the new book, “What It's Like to Be a Dog: And Other Adventures in Animal Neuroscience.” More than 1,700 people signed an online