NPR, Morning Edition, June 4, 2009 by Martin Kaste
http://www.npr.org/templates/story/story.php?storyId=104922405
For almost three years, the Bush administration tried to quash the lawsuit, arguing that the wiretapping program was simply too secret for court. This is known as the state secrets privilege, and that usually is enough to convince a court to shut a case down. “The general attitude has been extremely deferential and has taken the government at its word, and has decided that if there are state secrets, then there’s state secrets,” Schwartz says.