thank you, dean rodriguez, for your kind words, and for the outstanding leadership that you provide, not only for this academic campus, but also for our nation's legal community. it is a privilege to be with you today, and to be among the distinguished faculty members, staff, alumni, and students who make northwestern such an extraordinary place. for more than 150 years, this law school has served as a training ground for future leaders, as a forum for critical, thoughtful debate, and as a meeting place to consider issues of national concern and global consequence. this afternoon, i am honored to be part of this tradition. and i'm grateful for the opportunity to join with you in discussing a defining issue of our time, a most critical responsibility that we share. how we will stay true to america's founding, and enduring, promises of security, justice and liberty. since this country's earliest days, the american people have risen to this challenge, and all that it demands. but, as we have seen, and as president john f. kennedy may have described best, in the long history of the world