The stock and bond markets may tumultuous right now, but gold prices have been on a tear. This week, they hit an all time high of $3,500 an ounce. In this episode, why nervous consumers, investment firms and even central banks are trading in cash for gold. Plus: The Trump administration announces incentives to get self-driving cars on the road and the largest passenger ship in the U.S. prepares to be sunk for science.