Implicit in the term “national defense” is the notion of defending those values and ideas which set this Nation apart. … It would indeed be ironic if, in the name of national defense, we would sanction the subversion of … those liberties … which makes the defense of the Nation worthwhile.

Earl Warren (1891-1974) American jurist and politician; Chief Justice of the Supreme Court (1953-69)

US v. Robel, 389 US 258 (1967)