"They will never be allowed back, at Shamsi or anywhere else," the official added, referring to the base in the country's southwest from which many of the unmanned aerial vehicles were deployed before the NATO attack in November.
In return, Pakistan would allow back U.S. military trainers, including special forces teams, and a resumption of close cooperation with the CIA in targeting militants who use the Pakistani side of the border as a safe haven and breeding ground for extremism. It would also reopen the Torkham and Chaman border crossings into Afghanistan, which have been closed to NATO supply convoys since the attack.

Read more: http://www.foxnews.com/world/2012/01/20/exclusive-pakistan-official-says-us-military-will-be-allowed-to-return-but-not/#ixzz1k2EhgSbA

So Pakistan is going to allow these US so called trainer to come in country again and create mess like they did in karachi, Peshawar and other part of country.. We should never ever allow US undercover CIA agents in this country...