Pakistan’s spy chief offered to resign Friday amid public outrage over the U.S. operation that killed Osama bin Laden, an incident that humiliated the nation’s army and cast doubt on the capabilities of an intelligence network long believed to be nearly omnipotent.

Lt. Gen. Ahmed Shuja Pasha, in emotional testimony at a private session of Parliament, apologized for what he said was an intelligence lapse and said he would leave his post if Prime Minister Yousaf Raza Gillani deemed him unfit for the job, according to lawmakers. Yet Pasha also spoke in defiant tones about Pakistan’s alliance with the United States, which was severely strained even before the bin Laden killing.