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Even if a judge orders damages, the chances of collecting are slim. Sometimes, judges have dismissed cases after the U.S. government indicated its opposition to them on diplomatic grounds.

Because of the war in Afghanistan, U.S. diplomats have a keen interest in maintaining Pakistan‘s cooperation, but tensions frequently emerge.

After the name of the CIA station chief was made public in connection with a potential Pakistani lawsuit over U.S. missile strikes, there were claims that ISI was responsible for the leak in retaliation for the New York lawsuits. ISI denied leaking the name.

The station chief was pulled out of Pakistan earlier this month after receiving threats to his life.

The United States has pushed Pakistan, with limited success, to fight Taliban and al Qaeda fighters sheltering in its tribal belt along the border with AfghanistanPakistan also is widely believed to cooperate secretly in the U.S. drone campaign by providing intelligence to help pinpoint missile targets.

On Monday, Pakistani helicopter gunships pounded a militant hideout in the Kurram tribal region near Afghanistan, killing at least 20 suspected insurgents, local government official Jamil Khan said. Many Taliban militants escaping a Pakistan army operation in the nearby Orakzai tribal region are believed to have fled to Kurram.

In Larkana, a southern city that is a power base of the ruling Pakistan People’s Party, unidentified gunmen opened fire on a car on Monday, killing two intelligence officers, local police Chief Irfan Baloch said.

Chief Baloch would not name the intelligence agency the victims worked for or suggest a motive, saying that a police investigation was in progress.

Associated Press writers Hussain Afzal in Parachinar, Pakistan, and Ashraf Khan in Karachi, Pakistan, contributed to this report.