In his book Descent Interval that revives the end of the war in Viet Nam, former CIA agent Franck Snepp described what happened to the communist high ranking officer Nguyen Van Tai. After being imprisoned for four years in a secret place, he was “disappeared” when he was thrown to the China Sea from a plane flying at an altitude of 10 000 feet. This proves that there’s nothing new in the participation of the CIA in tortures and unbelievable disappearances. What’s new is that since 9/11 there’s a network of “secret jails”, an American gulag where prisoners disappear.
The evidence about this gulag has appeared gradually. The survivors have revived their memories and some reports about the transfer of prisoners to countries where torture is practiced have been published. Today, we know that CIA planes are a common thing to see in British airports. Sometimes, there’re two planes at the same airport at the same time. This suggests an exchange.
Nothing proves that the British government is involved in this but it’s obvious that these transfers are ignored on purpose. Jack Straw should have demanded explanations from Condoleeza Rice. Today, being watched by British citizens, undoubtedly, the United States uses other countries, for sure. But this is no reason to close the case.

Source
The Independent (U.K.)

America must tell us the truth about its gulag”, by Chris Mullin, The Independent, December 4, 2005.