Join our expert "TechKnow" contributors Phil Torres, Lindsay Moran, Rachelle Oldmixon, and Kosta Grammatis as they explore new technology and its impact on our lives. Lindsay tests out the treatments doctors and therapists are using to help soldiers diagnosed with PTSD and traumatic brain injuries, including hyperbaric oxygen therapy and virtual reality therapy. And Kosta spends a day with Nissan to take a ride in their fully autonomous car.