On this edition of Wall Street Week, Sonal Desai, Franklin Templeton Fixed Income CIO explains why the Moody's cut to its US outlook is not likely to be important to holders of US debt. Michael Spence, Nobel Laureate in Economics and Stanford Business School Dean Emeritus says that AI will be a powerful digital assistant.  Afsaneh Beschloss, RockCreek CEO tells us why China is ahead of the west in climate investments, and Melissa Kearney, Aspen Economic Strategy Group director and University of Maryland Professor explains what it takes to build a resilient economy.