Europe's top human rights court is due to hear a case that involves the CIA's use of extraordinary rendition.
Khaled El Masri, a German citizen of Lebanese descent, says he was abducted in Macedonia seven years ago and transferred to secret prison in Afghanistan.
After CIA realised it was a case of mistaken identity El Masri was blindfolded and taken to Frankfurt where he was released without charge.
However, it will not be the CIA defending themselves but the Macedonian government, who he alleges worked alongside the US in what they called a global "war on terror".
El Masri has also started cases in Germany, Macedonia and Spain, as well as the US, but this is the first time Europe's highest court for human rights will hear all of his claims.
Al Jazeera's Caroline Malone reports.