Afghan forces arrested three Americans, including a purported former Green Beret, after raiding a jail they were allegedly running in the Afghan capital and finding prisoners hanging from their feet, officials said Thursday. The U.S. military, facing a widening inquiry into prisoner abuse, quickly distanced itself from the three, who had been posing as American agents before being detained Monday. State Department spokesman Richard Boucher said Thursday "the U.S. government does not employ or sponsor these men." Afghan officials also dismissed claims by the apparent ringleader, Jonathan K. Idema, that he was a "special adviser" to their security forces, saying...