"At a certain point there was common recognition of the untenable nature of what was happening in the FATA," said a former senior U.S. counter-terrorism official, referring to Pakistan's Federally Administered Tribal Areas where Al Qaeda is based.
The breaking point came when Musharraf was forced to resign mid-August, officials said. Within days, President Bush had approved the new rules: Rather than requiring Pakistan's permission to order a Predator strike, the agency was allowed to shoot first.
The effect was immediate.
There were two Predator strikes on Aug. 31, and three more by the end of the week. CIA officials had suspected that their targets were being tipped by Pakistani intelligence to pending U.S. strikes; bypassing the government ended that concern.
It also eliminated delays. Former CIA officials said getting permission from Pakistani authorities could take a day or more, sometimes causing the agency to lose track of the target. The missed opportunities were costly because it often took months to assemble the intelligence necessary for a strike.
In 2006, for example, the CIA got word from Pakistani intelligence that Habib was staying at a compound in Miram Shah. A CIA officer involved said he spent weeks at a Pakistani military outpost near the compound, monitoring images from a Predator on a flat-screen device.
"We had a Predator up there for hours at a stretch, just watching, watching," the official said. The agency studied the layout of the compound, trying to determine who slept where, and scanning the surrounding roads for the arrival of Habib's truck.
"They took a shot at the compound a week after I left," the official said. "We got some bodyguards, but he was not there." It took more than two years for the agency to catch up to Habib again. He was killed in a Predator strike in South Waziristan in October.
Pakistan has repeatedly criticized the Predator campaign; the attacks are reported to have caused dozens of civilian casualties. "Drone attacks are counterproductive," said Nadeem Kiani, press attache at the Pakistan Embassy in Washington. Rather than firing missiles, Kiani said, the United States should provide intelligence to Pakistan "and we will take immediate action."
U.S. officials say that despite such complaints, the Pakistani government's opposition has been muted because the CIA has expanded its targeting to include militant groups that threaten the government in Islamabad.