Any of our volunteers. You can also pick up a copy of the magazine if you dont have it already and find us online at smithsonianassociates. Org. Please take a moment to silence any mobile devices. Housee cspan in the. Onight just an additional note, our exit, generally we have one in the back and one to your right. You may have noticed there is a lot going on in the Ridley Center today, and that backdoor is blocked, so please, for your safety and others, use this door to your right as the exit. I think that is all the announcements i have for you, and again, thank you to cspan for being here today. Finally, let me tell you about our guest today, jonathan rosenberg. Jonathan rosenberg teaches 20th at the u. S. History Graduate Center of the university of new york. Receiving his phd in history from harvard, rosenberg, a graduate of julliard, worked as a Classical Musician. He is also the author of dangerous mines Classical Music in america from the great war to the cold war and it is ava