The purpose of my remarks tonight is to focus your attention on this little group of men who not only enjoy a right of instant rebuttal to every Presidential address, but, more importantly,wield a free hand in selecting, presenting,and interpreting the great issues in our nation. First, let's define that power.At least 40 million Americans every night, it's estimated, watch the network news. Seven million of them view A.B.C., the remainder being divided between N.B.C. and C.B.S. According to Harris polls and other studies, for millions of Americans the networks are the sole source of national and world news. In Will Roger's observation, what you knew was what you read in the newspaper. Today for growing millions of Americans, it's what they see and hear on their television sets.Now how is this network news determined? A small group of men, numbering perhaps no more than a dozen anchormen, commentators,and executive producers, settle upon the 20minutes or so of film and commentary that's to reach the public. This selection is made from the 90 to 180 minutes that may be available. Their powers of choice are broad.