The sixth amendment to the constitution guarantees a defendant in a criminal case means to compel witnesses in his or her defense to appear. Since a main thrust of the amendment is to provide the defendant with a speedy and public trial, one assumes that the original intent was that these witnesses would appear at the trial so as to gain maximum benefit from their immediate presence and the opportunity to follow up with questions to clarify their pro-defendant testimony. This web site examines the amendment and some cases relative to it. http://supreme.lp.findlaw.com/constitution/amendment06/09.html#1
Now, along comes the Justice Department denying Lindh the power to compel witnesses favorable to him to appear on the grounds of, you guessed it, national security. This story in the Los Angeles Times gives some details. http://www.latimes.com/news/nationworld/nation/la-000034378may15.story
How does this sound to you? It troubles me and I hope the judge is strict about making the prosecutors present an absolutely compelling argument. The “national security” business is easy to run into the ground in my opinion.