Limited public access to the proceedings of some military tribunal cases for suspected terrorists is legal and justifiable. Military law is often times a whole different animal than regular criminal law, so if civilians were to see the proceedings of military law, they would not understand the trial process and so nothing would be accomplished.
There should be complete transparency, when the military tries to more a legal judgement of a person, and actually, military trials are illigitimate. Even though the Bill of Rights establishes special procedures for legal cases in time of war, the Bill of Rights was actually wrong in its interpretation of natural rights in this case. Full legal rights are possessed but citizen or alien, whether in time of war or peace, within our borders or without,