London Telegraph 
November 26, 2013
The CIA used a secret base at Guantanamo Bay nicknamed ‘Penny Lane’ to turn some of al-Qaeda’s most dangerous terrorists into double agents, US officials have admitted
Inmates languishing under Guantanamo Bay’s harsh regime were offered cash rewards, “hotel” style rooms and even pornography if they agreed to help the CIA track down and kill fellow al-Qaeda operatives.
Instead of Guantanamo’s spartan cells, they would be transferred to cottages equipped with private kitchens, showers and televisions, as well as their own patio.
A handful then signed agreements to work for the CIA, under which they were released and told to hook up once more with their former comrades.