Brief of Mutual Broadcasting System, Inc., intervener, National Broadcasting Company, Inc., Woodmen of the World Life Insurance Society and Stromberg-Carlson Telephone Manufacturing Company, plaintiffs v. United States of America and the Federal Communications Commission, defendants, Mutual Broadcasting System, Inc., intervener . Columbia Broadcasting System, Inc., plaintiff v. the United States of America, defendant, Federal Communications Commission and Mutual Broadcasting System, Inc., interveners; Civil actions nos. 16-178 and 16-179 in the District Court of the United States, Southern District of New York. Emanuel Dannett, attorney for intervener.