A Yemeni soldier stands guard Tuesday near Sanaa International Airport. Mohammed Huwais /AFP/Getty Images hide caption

itoggle caption Mohammed Huwais /AFP/Getty Images

This undated image from video, seized from the walled compound of al-Qaida leader Osama bin Laden in Abbottabad, Pakistan, and released by the U.S. Department of Defense on May 7, 2011, shows bin Laden watching President Obama on television. AP hide caption

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In this image from video, Mokhtar Belmokhtar claims responsibility for a deadly attack on a BP gas facility in Algeria. The Chadian military reported its forces had killed him in a raid in Mali on Saturday. Uncredited/SITE Intel Group/AP hide caption

itoggle caption Uncredited/SITE Intel Group/AP

In this Wednesday, Feb. 20, 2013 photo, a young vendor waits for clients alongside woven reed mats of the type purchased by fleeing Islamists, apparently to camouflage their vehicles, in Timbuktu, Mali. Rukmini Callimachi/AP hide caption

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October 2011: Men stand on the rubble of a building destroyed by a U.S. drone strike in southeastern Yemen. Among those killed was U.S. citizen Abdulrahman al-Awlaki, the son of U.S.-born cleric Anwar al-Awlaki — who himself was killed by a drone strike the month before. Khaled Abdullah /Reuters /Landov hide caption

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Islamist militants raided the In Amenas natural gas field (pictured) in Algeria on Wednesday and took several hostages. BP/AP hide caption

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This photo, released on Saturday by the French Army Communications Audiovisual office (ECPAD), shows French Mirage 2000 D jets flying over Mali. ECPAD/Xinhua /Landov hide caption

itoggle caption ECPAD/Xinhua /Landov

A map shown Sunday during a news conference held by French Defense Minister Jean-Yves Le Drian in Paris shows the movement of French troops and aircraft n Mali. Kenzo Tribouillard /AFP/Getty Images hide caption

itoggle caption Kenzo Tribouillard /AFP/Getty Images