A competitor takes part in a cliff-diving competition during a rainy day near the central Bohemian village of Hrimezdice, July 30, 2011. [Photo/Agencies]

Amanda Knox (R), the US student convicted of killing her British flatmate in Italy three years ago, looks as she attends in a court during a trial session in Perugia July 30, 2011. Independent forensic experts took the stand on Monday to attack key pieces of evidence used to convict US student Amanda Knox of the murder of her British flatmate in the Italian city of Perugia in 2007. [Photo/Agencies]