GUEST: Thom Hartmann , renowned progressive radio talk show host, New York Times bestselling author of two dozen books including the new book, The Hidden History of Guns and the Second Amendment . BACKGROUND: The United States stands out from much of the world today in proliferating firearms at a rate that is breathtaking. The vocal demands of a gun-loving minority have led to tens of thousands of deaths a year. High profile mass shootings, particularly on school campuses, lead to outpourings of "thoughts and prayers," but little else. Members of Congress cower in the face of the powerful gun lobby and shrug their shoulders in helplessness. We are all told over and over again that the Second Amendment right to bear arms is supreme over our right to safety. Now a new book puts the American obsession with guns into a much-needed political and historical framework.