The United States is investigating the extent of Syria's role in alleged espionage at the Guantanamo detention center for hundreds of Afghan war prisoners, a top general said, as a probe widened to other US services.An Air Force translator, Senior Airman Ahmad al-Halabi, was arrested July 23 on charges of espionage and aiding the enemy by attempting to send intelligence, names and serial numbers of prisoners to Syria, and carrying a laptop computer with 180 classified notes for delivery to Syria."If it turns out that this guy is guilty, and it turns out that he was talking to Syria...