tonight, we are joined by sara bloomfield, the director of the united states memorial holocaust memorial museum and alice greenwald, the president and ceo of the 9/11 memorial and museum. they have been friends and colleagues for 30 years. tonight, they will give us a behind-the-scenes look into the creation, the design, and impact of living memorials and what they hope the future holds for their institutions and all of us. now it is my pleasure to introduce tonight's moderator and the esteemed host of npr's weekend edition saturday and nbc's weekend morning, scott simon. mr. simon: cbs actually, but it any case. [laughter] that's all right, thank you. i wonder how much that little mistake will cost me. [laughter] look, it's an honor to be here. my wife and i feel very strongly about any small thing and there are small things we are able to do to try and support the work of this institution and it strikes me that both of these museums have taken on the task of vivifying memories in a way that make them alive in our lives and makes their importance something that we can touch, that we can