President Obama speaks at the Nunn-Lugar Cooperative Threat Reduction (CTR) symposium at the National Defense University at Fort McNair in Washington on Monday, Dec. 3, 2012. (Associated Press)

Photo by: Charles Dharapak

President Obama speaks at the Nunn-Lugar Cooperative Threat Reduction (CTR) symposium at the National Defense University at Fort McNair in Washington on Monday, Dec. 3, 2012. (Associated Press)