A U.S. Predator drone flies through the night sky over Kandahar Air Field in Afghanistan. Such drones have been targeting groups such as the Haqqani network that are accused of attacking U.S. and Afghan forces. Kirsty Wigglesworth/AP hide caption

itoggle caption Kirsty Wigglesworth/AP

Secretary of State Hillary Clinton speaks in Islamabad Friday, as Pakistan Foreign Minister Hina Rabbani Khar looks on. Clinton urged Pakistan to act swiftly to dislodge the militant Haqqani network.

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In this archive photo from October 21, 2001, Jalaluddin Haqqani smiles as he leaves after a meeting with Jama"at-i-Islami leaders in Islamabad, Pakistan.

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Afghan Security personnel stand above the body of one attacker, on the 10th floor of the building in Kabul from which RPGs and other weapons were fired. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Fire broke out in Kabul's Inter-Continental Hotel on Tuesday during the attack. Massoud Hossaini /AFP/Getty Images hide caption

itoggle caption Massoud Hossaini /AFP/Getty Images