NEW YORK -Its not just the drones. In recent years, the US special operations forces have regularly and surreptitiously slipped into Pakistan, raiding suspected terrorist hideouts, claimed New Yorker in a detailed report in its latest edition. It said the team that killed Osama bin Laden those guys alone had conducted ten to twelve of those missions before they hit that infamous compound in Abbottabad. Report, written by Nicholas Schmidle, puts together the most detailed picture so far of the raid that killed Osama bin Laden. But the most combustible component of the explosive article might be the disclosure that US commandos sneak into Pakistan regularly. Retired Gen. Doug Lute, who oversees Afghanistan and Pakistan strategy at the White House, admitted that there was a major humiliation factor. But he said now was the time to double down on the raids, with al-Qaida in disarray. We need to go for the knockout punch. A senior Defense Department said. Most of the missions take off and go left, he said. This one took off and went right. Perhaps its not so bad if those 15 minutes last another second or two longer. Since the bin Laden raid, the government of Pakistan claimed it was kicking dozens of US military trainers out of the country. Islamabad made noises about shutting down a base from which US drones took off. Agencies, the top US military officer has said the border region between Afghanistan and Pakistan is still the worlds most dangerous area, calling it the epicentre of terrorism. In a BBC interview, Admiral Mike Mullen again called on Pakistan to end safe havens there. Mullen has been visiting US bases in southern and eastern Afghanistan. The trip could be Adm Mullens last to the region before he retires as chairman of the joint chiefs of staff. Mullen said his biggest worry, as he neared the end of his four-year tenure, was continued instability in Pakistans tribal areas along the Afghan border. He said despite the death of Osama bin Laden, plenty of bin Laden acolytes were still plotting operations beyond the region. He has often raised this issue with senior Pakistani military leaders. Probably one of the things Ive learned is that Im a little bit more impatient and Id like to see things happen more quickly, Mullen said. Their patience level is such that sometimes we would disagree on time frames and the need to move now, but again thats a choice they get to make with their own forces, it doesnt mean we dont continue to address these issues. Mullen said Pakistan had lost many of its own troops taking action against some groups. But he said that unless they moved against terrorists like the Afghan Haqqani network, it could affect relations between Washington and Islamabad. He admitted relations were still very strained in the wake of the secret US raid in May that killed Osama bin Laden and embarrassed the Pakistan military. But he said the answer was not to sever ties. Pakistan has always made it clear it has its own strategic interests and approaches in the region. Mullen said he understood that, but in the long run he said a strategy of using proxies to foment violence had to change. If instability worsened, it would, as he put it, be a real challenge for everyone. Mullen said that insurgent safe havens in Pakistan were an ongoing problem for the Nato-led International Security Assistance Force (Isaf).