Satellite images could help determine if the CIA has been operating secret prisons in Europe.That is the latest from the Swiss MP, Dick Marty, who has been appointed to compile a report on the affair for the Council of Europe’s human rights watchdog.Pressure is mounting on the US to explain reports of secret CIA flights across the continent carrying terrorist suspects. It is claimed prisoners have been moved to third countries where laws on interrogation techniques are more relaxed.Romania and Poland have been named by Human Rights Watch as possible sites for secret prisons. Both countries deny that.Germany’s Justice Minister, Brigitte Zypries, says her country will wait and see for the time being, hoping that the Americans shed light on the situation. However, Green MP, Christian Stroebele, is calling for urgent action.He says he expects the justice minister and new chancellor, Angela Merkel, to use their first contacts with the US to address the issue in order to clear what he calls the “shadow” that has fallen over relations between Berlin and Washington. German prosecutors are already investigating alleged secret transfers by the CIA. And while Switzerland’s Dick Marty continues his inquiry for the Council of Europe, he has already said it would be impossible for a Guantanamo Bay-style facility to be secretly maintained in Europe for any length of time.