Show U. U S. S and Canada Join in Survey of Polar Lands W WASHINGTON Mindful Mindful of a atomic atom tom tomIc ic age possibilities the United States and Canada are beginning to work out joint plans to defend North America against any attack from Asia or Europe across the north polar regions Disclosing this allied diplomatic officials said one of the first firt specific steps taken by this country was the assignment of six observers to accompany accompany ac ac- accompany ac- ac company a Canadian army air forces expedition on an day 81 arctic arctic arctic arc arc- tic exploration Assigned the task of gathering military and scientific information this expedition has been designated officially Exercise by bythe bythe bythe the Canadian government It will cover miles miles' through territory which heretofore has been considered considered considered consid consid- ered an Impenetrable barrier against attack Now diplomats say the wasteland wasteland wasteland waste waste- land area is regarded as one of the potential approaches to some of Americas America's greatest cities clUes i In two segments the expedition is scheduled to start from Churchill Manitoba In mid February and from Edmonton Alberta in early May |