LEADERS' MEETING As the Defense Policy Board convenes for its annual meeting at the Pentagon, Nov. 29, 2011, Defense Secretary Leon E. Panetta, center right, greets Brent Scowcroft, former national security advisor left, former Sen. Sam Nunn, of Georgia, center, and former Deputy Defense Secretary John Hamre, right, now president and chief executive officer of the Center for Strategic and International Studies. Hamre also served as chairman of the Defense Policy Board. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 174017-T-MYY21-725.jpg Photo Gallery