I found this speech of JFK's to be tremendously powerful, and the applicability to today's situation should be obvious. Kennedy was speaking to the American Newspaper Publisher's Association on April 27th, 1961. The whole speech is worth reading, but I wanted to highlight a few key excerpts, especially in the context of Wikileaks' release of war documents from the Afghanistan theater. Kennedy simultaneously pleads for a more well-informed public, while arguing that the press ought to be mindful of national security issues in choosing which stories to publish. You can almost imagine him talking about the danger posed by terrorists in the present day, rather than the danger of Communism in the Cold-war 1960s:

The very word "secrecy" is repugnant in a free and open society; and we are as a people inherently and historically opposed to secret societies, to secret oaths and to secret proceedings. We decided long ago that the dangers of excessive and unwarranted concealment of pertinent facts far outweighed the dangers which are cited to justify it. Even today, there is little value in opposing the threat of a closed society by imitating its arbitrary restrictions. Even today, there is little value in insuring the survival of our nation if our traditions do not survive with it.