Court martial proceedings have begun for an Army sergeant accused of using military dogs to threaten detainees at Abu Ghraib. The trial of Sgt. Santos Cardona may expose who within the Pentagon’s chain of command ordered soliders to abuse and torture detainees at the Iraqi prison. For the first time Major General Geoffrey Miller is expected to testify about what happened at the prison. Until now Miller has refused to publicly speak about his role overseeing interrogations at Abu Ghraib or Guantanamo. Meanwhile it has now been revealed that Defense Secretary Donald Rumsfeld directly communicated with Miller and other senior defense officials by video-teleconference about interrogation matters in November and December 2003. Lawyers for Sgt. Cardona are attempting to obtain copies of these videoconferences to use as their defense.