CIA gets nod to step up drone strikes in Pakistan KABUL, Afghanistan - Expressing both public and private frustration with Pakistan, the Obama administration has unleashed the CIA to resume an aggressive campaign of drone strikes in Pakistani territory over the last few weeks, approving strikes that might have been vetoed in the past for fear of angering Islamabad. Now, said a senior U.S. official, speaking on condition of anonymity in discussing sensitive issues, the administration's attitude is, "What do we have to lose?" Defense Secretary Leon E. Panetta made clear the deteriorating relations with Islamabad on Thursday, saying the United States is "reaching the limits of our patience" because Pakistan has not cracked down on local insurgents who carry out deadly attacks on U.S. troops and others in neighboring Afghanistan. "It is difficult to achieve peace in Afghanistan as long as there is safe haven for terrorists in Pakistan," Panetta told reporters here on the last stop of his nine-day swing through Asia. He made it clear that the drone strikes will continue. The CIA has launched eight Predator drone attacks since Pakistan's president, Asif Ali Zardari, was invited to attend the May 20-21 NATO summit in Chicago but refused to make a deal to reopen crucial routes used to supply U.S. troops in Afghanistan, as the White House had hoped. The CIA had logged 14 remotely piloted strikes on targets in Pakistan's rugged tribal belt in the previous 5 1/2 months, according to the New America Foundation, a U.S. think tank that tracks reported attacks. "Obviously, something changed after Chicago," said a senior congressional aide in Washington, speaking on condition of anonymity in discussing a classified program. I am only getting the official story, but even within the official story there is an acknowledgment that something has changed. Another congressional official said the surge in drone attacks stemmed in part from success in tracking down militants on the CIA's target list, although only one has been publicly identified. It's unclear who else has been targeted. Pakistanis view the drone strikes as an attempt to intimidate their civilian and military leaders into giving in to U.S. demands. If that's the strategy, it won't work, said experts and analysts in Islamabad, the Pakistani capital. "They are trying to send a message: 'If you don't come around, we will continue with our plan, the way we want to do it,' " said Javed Ashraf Qazi, a retired Pakistani intelligence chief and former senator. It's "superpower arrogance being shown to a smaller state.... But this will only increase the feeling among Pakistanis that the Americans are bent on having their way through force and not negotiation. A White House official said no political or foreign policy considerations would have prevented the CIA from taking action when it found Abu Yahya al Libi, Al Qaeda's No. 2 leader, who was killed by a drone-fired missile in Pakistan on Monday. Both sides blame each other for the current dispute. Pakistan blocked truck convoys hauling North Atlantic Treaty Organization war supplies from the port city of Karachi after a clash near the Afghan border in November led to errors andU.S. military helicopters accidentally killed two dozen Pakistani soldiers. As part of the fallout, Pakistan ordered the U.S. to leave an air base in the country's southwest that the CIA had used to launch drone flights bound for targets in the tribal areas. Since then, the aircraft reportedly have flown from across the border in Afghanistan. The U.S. initially halted all drone strikes for two months to ease Pakistani sensitivities, and the attacks resumed only sporadically after mid-January. By May, Pakistani officials were signaling a willingness to reopen the supply route to resurrect relations. But talks deadlocked over Pakistan's demands for sharply higher transit fees just before the NATO conference, and President Obama appeared to give Zardari a cold shoulder in Chicago. Pentagon officials will visit Islamabad this week for a new round of talks. After the U.S.-led invasion of Afghanistan in late 2001, Pakistan allowed NATO supplies to transit through its territory at no charge. It later levied a token $250 charge per truck. Islamabad now wants more than $5,000 per truck to reopen the road, a toll U.S. officials refuse to pay. As an alternative to Pakistan, Washington concluded a deal this week to haul military gear out of landlocked Afghanistan through three Central Asian nations - Uzbekistan, Kyrgyzstan and Kazakhstan - as NATO coalition troops withdraw. The senior U.S. official said the Obama administration and members of Congress were angered when a Pakistani court sentenced Shakeel Afridi, a doctor who helped the CIA search for Osama bin Laden, to 33 years in prison. Navy SEALs killed Bin Laden in May 2011 in the Pakistani garrison city of Abbottabad.