Luke Somers, 33, an American photojournalist who was kidnapped over a year ago by al-Qaida, poses for a picture during a parade marking the second anniversary of the revolution in Sanaa, Yemen. Hani Mohammed/AP hide caption

itoggle caption Hani Mohammed/AP

The Express newspaper reported that U.K. officials have intelligence suggesting al-Qaida has been planning a high-profile attack on five commercial flights sometime before Christmas. Mark Wilson/Getty Images hide caption

itoggle caption Mark Wilson/Getty Images

Supporters of the al-Nusra Front protest in Aleppo, Syria, on Sept. 26, days after airstrikes there targeted the al-Qaida unit called Khorasan. U.S. officials say some top Khorasan leaders were embedded with the Nusra Front, al-Qaida's arm in Syria. Fadi al-Halabi/AFP/Getty Images hide caption

itoggle caption Fadi al-Halabi/AFP/Getty Images

Lt. Gen. William C. Mayville Jr., Joint Staff Director of Operations, speaks about airstrikes in Syria during a briefing at the Pentagon yesterday. Brendan Smialowski/AFP/Getty Images hide caption

itoggle caption Brendan Smialowski/AFP/Getty Images

Yemeni soldiers hold up their weapons at an area seized from al-Qaida in the southeastern province of Shabwa, Yemen, on May 8. President Obama said Wednesday that U.S. strategy against the so-called Islamic State would be similar to how it targeted militants in Yemen and Somalia. Yemen's Defense Ministry/AP hide caption

itoggle caption Yemen's Defense Ministry/AP

Al-Qaida leader Ayman al-Zawahiri is shown here in a still image posted online in 2011. In a video released this week, he announced that al-Qaida was establishing a faction in the Asian subcontinent with a focus on India. AP hide caption

itoggle caption AP

Fighting between Iraqi government forces and the Islamic State of Iraq and Syria leaves buildings destroyed in Ramadi on Tuesday. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images

In this image taken from video and released by SITE Intelligence Group, Anwar al-Awlaki speaks in a video message posted on radical websites in November, 2010. SITE Intelligence Group/AP hide caption

itoggle caption SITE Intelligence Group/AP

Sulaiman Abu Ghaith appears in this still image taken from an undated video address. Abu Ghaith, one of Osama bin Laden's sons-in-law and a former spokesman for al-Qaeda, is on trial in New York. Reuters/Landov hide caption

itoggle caption Reuters/Landov

A U.S. drone in the sky over Kandahar Air Field in Afghanistan. Kirsty Wigglesworth/AP hide caption

itoggle caption Kirsty Wigglesworth/AP

In January, this Free Syrian Army fighter stood in front of graffiti in Aleppo that read, roughly, "down with the Islamic State of Iraq and the Levant." On Monday, al-Qaida's leadership said it has no ties with that jihadist group. Jalal Alhalabi /Reuters/Landov hide caption

itoggle caption Jalal Alhalabi /Reuters/Landov

An Iraqi riot police officer flashes the V-sign as his unit returns to its headquarters from clashes with al-Qaida fighters in Basra, Iraq's second-largest city, in the restive Anbar Province. Nabil al-Jurani/AP hide caption

itoggle caption Nabil al-Jurani/AP

In Fallujah on Saturday, Sunni fighters turned out for the funeral of a man killed by Iraqi army artillery fire. Mohammed Jalil /EPA/LANDOV hide caption

itoggle caption Mohammed Jalil /EPA/LANDOV