With US/Russia relations at their worst since the Cold War, there are warnings that Vladimir Putin might end his nation’s participation in the International Space Station. Could Russia go even further and cut off rides for US astronauts to the ISS?  Later, Casey Dreier joins Spark Science host Regina Barber Degraaff for a conversation with US Congressman Rick Larsen, Democratic representative of Washington state’s 2nd District.  This month’s show opens with an overview of the NASA appropriations bill just passed by the US Senate. More resources to explore this month’s topics are at http://www.planetary.org/multimedia/planetary-radio/show/2017/space-policy-edition-15.html  A new episode of the Space Policy Edition is posted on the first Friday of each month.