American planes are towed into Canada to avoid breaching neutrality rules.
Canada / United States of America (USA).
Shots of Canadian troops standing guard on their border with USA.
VS of American bombers being pulled across the border line into Canada. American pilots are not allowed to fly aircraft into Canada because of the neutrality laws, the aircraft are for use by the allies both in Canada and Europe. Shots of plane now on Canadian soil as it prepares for take off.