There are hazards in debating American policy in the face of a stern and dangerous enemy. But that hazard is the essence of our democracy. Democracy is no easy form of government. Few nations have been able to sustain it. For it requires that we take the chances of freedom; that the liberating play of reason be brought to bear on events filled with passion; that dissent be allowed to make its appeal for acceptance; that men chance error in their search for the truth....