This book in some ways gives voice to those people and those concerns, and hopefully will cause others in the community to at least engage the question at a more serious level than just the reflex reaction against guns that is sort of a caricature of what the actual conversation needs to be. Host certainly has given me rope to revisit my thinking about guns and with a more historically informed perspective. Thank you for that contribution. Guest thank you for your interview. Next, robert gates at the National Constitution center in philadelphia. He discusses his momentum moyer. Duty memoirs of a secretary at war. In the book, mr. Gates, who served as secretary of defense under president george w. Bush and president obama, talks about his management of the wars in afghanistan and iraq and shares stories about his relationship with the white house and congress. [applause] secretary gates, i want to thank you for being here, especially in light of the fact you recently had an injury. I kn