U.S. Secretary of Defense Chuck Hagel addresses the International Institute of Strategic Studies (IISS) conference in Manama, Bahrain, on Saturday, Dec. 7, 2013. The conference is expected to discuss regional security issues including the recently reached deal on Iran's nuclear program. (AP Photo/Hasan Jamali)

Photo by: Hasan Jamali

U.S. Secretary of Defense Chuck Hagel addresses the International Institute of Strategic Studies (IISS) conference in Manama, Bahrain, on Saturday, Dec. 7, 2013. The conference is expected to discuss regional security issues including the recently reached deal on Iran's nuclear program. (AP Photo/Hasan Jamali)