On today's show, Ken and Mark heard all about self-driving cars from the author of the book, "Autonomy:  The Quest to Build the Driverless Car" Lawrence D. Burns.  From Kiplinger, David Muhlbaum with 14 ways to save on taxes under the new tax law.  Kathy Fetke of Real Wealth Network with information on the plummeting prices of existing home sales.  Stuart Spivak and Tim Hague stopped by the studios to talk about Spivak Financial Group.