ARCTIC ICE CAP ADVENTURE From the forbidding frontier of the arctic icecap at the top of the world, come rare films made by a task force of army engineers. Amid eternal snow and cold, military and civilian personnel are finding out how to erect settlements on the icecap. How to conquer an area vital to America’s defense perimeter. Trail markers guide supply trains. There are five army camps in all, 14 to 220 miles apart in this land of eery silence and sudden storms. Meteorological stations are set up to collect important weather data. A handful of troops and scientists will man the outposts during the long arctic night. Ice samples come in for study by the engineers. A dynamite charge is planted to blast a cornice across the entrance to an ice tunnel. The arctic, which has kept its icy secrets for centuries, is yielding at last to the scientific assaults of man.