KEYNOTE SPEAKER Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, addresses the audience as a keynote speaker during the Ambassador S. Davis Phillips Family International Lecture series at Duke University in Durham, N.C., Jan. 12, 2012. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 110640-R-YOK07-220.jpg Photo Gallery