Gen. Carter Ham is head of the U.S. African command. An Army brigade from Fort Riley, Kan., will begin helping train African militaries beat back a growing terrorist threat posed by al-Qaida. AP hide caption

itoggle caption AP

Sen. Chuck Hagel, R-Neb., and then-presidential candidate Barack Obama in Amman, Jordan, in 2008. Paul J. Richards/AFP/Getty Images hide caption

itoggle caption Paul J. Richards/AFP/Getty Images

USS Enterprise sails in the Persian Gulf while in support of Operation Southern Watch and the extended "no-fly" zone over Iraq on Sept. 22, 1996. Matthew Hostetler/AP hide caption

itoggle caption Matthew Hostetler/AP

A Libyan military guard stands in front of one of the U.S. Consulate's burned out buildings on Sept. 14. The U.S. is offering new details of the attack on the consulate that killed four Americans, including Ambassador Chris Stevens. Mohammad Hannon/AP hide caption

itoggle caption Mohammad Hannon/AP

Afghan soldiers stand at attention during a ceremony transferring authority from NATO-led troops to Afghan security forces in Afghanistan's Kunar province. The transfer of responsibility for security from NATO-led ISAF forces to Afghan troops is scheduled to be completed by the end of 2014. Rahmat Gul/AP hide caption

itoggle caption Rahmat Gul/AP