"The First Amendment concept of a "free press" must be read in the light of the struggle of free men against prior restraint of publication. From the time of Blackstone it was a tenet of the founding fathers that precensorship was the primary evil to be dealt with in the First Amendment. Fortunately upon the facts adduced in this case there is no sharp clash such as might have appeared between the vital security interest of the Nation and the compelling Constitutional doctrine against prior restraint. If there be some embarrassment to the Government in security aspects as remote as the general embarrassment that flows from any security breach, we must learn to live with it. The security of the Nation is not at the ramparts alone. Security also lies in the value of our free institutions. A cantankerous press, an obstinate press, an ubiquitous press must be suffered by those in authority in order to preserve the even greater values of freedom of expression and the right of the people to know. In this case there has been no attempt by the Government at political suppression. There has been no attempt to stifle criticism. Yet in the last analysis it is not merely the opinion of the editorial writer or of the columnist which is protected by the First Amendment. It is the free flow of information so that the public will be informed about the Government and its actions. These are troubled times. There is no greater safety valve for discontent and cynicism about the affairs of Government than freedom of expression in any form. This has been the genius of our institutions throughout our history. It is one of the marked traits of our national life that distinguish us from other nations under different forms of government."