Today on CNN10: We conduct an experiment to see how convincing an A.I. chatbot can really be. Plus, as the penny gets ready to leave the U.S. currency system next year, some businesses are already refusing it. Then, we'll see how firefighters and other first responders are finding relief from chronic stress, thanks to First Responder Therapy Dogs. All this and more on today's CNN10! Learn more about your ad choices. Visit podcastchoices.com/adchoices
