On the first cloudy day in November, Tom Blacker, the shining light of Ostreich and Company, Public Relations Counsellors, placed a call to a shirtsleeved man on the rooftop of the Cannon Building in New York City. His message brought an immediate response from the waiting engineer, who flicked switches and twirled dials with expert motions, and brought into play the gigantic 50,000-watt projector installed on the peak. In his own office, Tom paced the floor in front of the three-window exposure