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

This receipt for groceries, which includes prices paid for tomatoes, onions, charcoal, meat and a light bulb, was retrieved from a building occupied by al-Qaida's North African branch in Timbuktu, Mali. /AP hide caption

itoggle caption /AP

Warren Weinstein, who was kidnapped in Pakistan in August 2011, in a video sent to news outlets by al-Qaida's media wing. The Associated Press hide caption

itoggle caption The Associated Press