Extraordinary rendition is a euphemism used to describe the secret and illegal movement of terrorism suspects for interrogation (sadly, a euphemism for torture) from the United States (where we pretend to have things called civil rights) to countries where such practices are legal. Although the actual rendition was mostly carried out by the CIA, it depended on the cooperation, and silence, of several other countries. It has now been "abolished" by Barack Obama.
According to current estimates, over 3,000 terror suspects were abducted around the world and transferred to camps since Bush's declaration of "War on Terror" in 2001.
While President Obama has drastically limited the practice to be all but eliminated, he still retains the "legal" right to use extraordinary rendition under specific and particular circumstances. According to an inquiry into United States CIA billing practices for 2010, it appears Obama has used rendition in 2 cases since he took office. It should be zero.
 Co-operating countries
Fourteen European countries were found to have cooperated in extraordinary rendition, according to a report of the European Parliament. They were: Austria, Belgium, Cyprus, Denmark, Germany, Greece, Ireland, Italy, Poland, Portugal, Romania, Spain, Sweden and the United Kingdom.