SHAWANGAI, Pakistan -- An alleged member of the Hamburg, Germany, terror cell linked to the Sept. 11 attacks is believed to be among al Qaeda leaders helping the Taliban fight Pakistani forces in South Waziristan, Pakistani authorities said Thursday. A German passport belonging to Said Bahaji, a close associate of Sept. 11 lead hijacker Mohammed Atta in the 2001 attacks, was among documents recovered this week by Pakistani troops from an abandoned militant compound in Shawangai. The mountain village in South Waziristan was used as an al Qaeda and Taliban command base until as recently as this week, a military...