EXCLUSIVE The discovery of computer materials belonging to al-Qaeda operatives in Pakistan led American officials to warn of threats to specific facilities inside the U.S. Several hard drives and 51 computer discs recovered in Pakistan provide evidence that al-Qaeda has conducted extensive surveillance of U.S. targets. Surveillance reports found on the computers contain some 500 photographs of targeted buildings and discussions about how to hit them. A senior U.S. law-enforcement official gave TIME's Adam Zagorin a partial inventory of the material, including descriptions of potential attacks in the terrorists' words:
NEW YORK CITY
DATA GATHERED A major focus of both the...