Torture Taxi: On the Trail of the CIA's Rendition Flights is a 2006 book by A. C. Thompson and Trevor Paglen documenting the CIA's extraordinary rendition program.[1]
The authors note the discovery of the program's means of transportation, rendition aircraft, by aviation enthusiasts, who spotted discrepancies in the flights of four aircraft, and correlations between their unusual flight patterns and the list of sites reputed to be the destination for ghost detainees.[2]