December 3, 2012 - 7:34 PM
Sen. Dick Lugar, R-Ind., right, former Sen. Sam Nunn, D-Ga., center, and Defense Secretary Leon Panetta, left, listen as President Barack Obama, not pictured, speaks at the Nunn-Lugar Cooperative Threat Reduction (CTR) symposium being held at the National Defense University at Fort McNair in Washington, Monday, Dec. 3, 2012.(AP Photo/Charles Dharapak)