Instructors at a prestigious Pakistani defense institution are giving anti-American lessons to senior officers attending courses, according to a leaked U.S. diplomatic cable, a revelation that suggests a deep bias against Washington at the highest levels of the military. The dispatch, dated 2008, shows the challenges for the United States as it tries to overcome deep suspicions in a country that is a vital, if difficult, partner in the fight against al-Qaida and has received more than $10 billion in American aid since 2001. The unilateral American raid on Osama bin Laden on May 2 has exposed a fresh seam of hostility toward America in the army. That bin Laden was caught in an army town not far from a military academy has added to suspicions in Washington that Pakistan cannot be trusted. Some legislators now say America should cut aid despite the nuclear-armed country's Geo-strategic importance.