US Defence Secretary Leon Panetta has once again blamed that someone in authority in Pakistan knew Osama bin Laden’s whereabouts before US forces went in to find him. In an interview on Saturday, he said Intelligence reports found Pakistani military helicopters had passed over the compound in Abbottabad. “I personally have always felt that somebody must have had some sense of what was happening at this compound. Don’t forget, this compound had 18-foot walls… It was the largest compound in the area,” he was quoted as saying by news agencies.