Dr. Dave Williams - is a physician, Canadian Astronaut, Aquanaut & Best-Selling Author, who flew in space on STS-90 and STS-118. He helped build the International Space Station and holds the Canadian record for spacewalks. Through writing, public speaking and consulting, Dr. Dave is passionate about sharing his perspective on living life to the fullest, on scientific discovery, extreme environment medicine, leadership and teamwork. www.astrodavemd.ca