The squad suddenly feared militant goes rogue in the NWA

A blindfolded man stands on explosives, trembling as he confesses to spying for the CIA in Pakistan. The men with balaclavas on blacks say slowly away. Then it exploded.

One of his Executioners - members of a militant elite hit the squad - zooms in on a camera head and its body parts divided by a video later distributed in street markets as a warning.

Al-Qaeda, the Taliban and Haqqani network has selected the most ruthless fighters from their ranks in 2009 to form the unit of Khurasan, for a special mission.

The militant groups do not have the military technology of the American program to match the buzz intensified in Pakistan's tribal areas, but they understand the value of human intelligence and fear, conflict.

So the Khurasan was deployed to hunt down and eliminate anyone suspected of assistance, Americans or their allies the Pakistani military and government.

Just this week, a couple visiting Afghanistan, Pakistan has been completely shot to spy in North Waziristan.

"The whole community is afraid of Khurasan, and sometimes we ask that they` have seen the videos, '"said a man who, like everyone else interviewed about Khurasan, asked to remain anonymous for fear of reprisals.

"They have people everywhere. How do I know who is an informant for them and who is not? "It is composed mainly of Arabs and Uzbeks, the Khurasan, a province named after the old Islamic empire, a dark group of several hundred men who operate in North Waziristan.

The pilots of the CIA drones that work remotely, they could ascend their pursuit of the leaders of the Haqqani network after an attack on the U.S. mission in Kabul last month. That probably would push the Khurasan to become more ruthless, after you have blocked around 120 people accused of spying since 2009. When the suspected collaborators are caught are kept in cells in a network of secret prisons across North Waziristan.

A committee of clerics of Khurasan decides their fate. Most are guilty declared after group members admit they are "very," very hard questions.

"They are given electric shocks. If not then help an electric drill is used or the spies are forced to stand on the heaters, "said an operator of Khurasan. "Or the nails are hammered into their bodies." Any attempt to intervene on behalf of people who are locked is risky. The Khurasan see that as a collaboration with the enemy and it is still punishable by death.