Bourne Ultimatum

He is a man without nationality, without identity, and without past. His everything began at the Mediterranean coast of Italy - the place where he was found, floating on the sea, unconscious. Later, he knew that his name was Jason Bourne and he had been through very severe training, but he could not remember who had made him into the current sophisticated and subtle human weapon. Therefore, he spares no effort to know his past, and who taught him these killing skills?