US Army Air Corps prepares for winter maneuvers in Concord, NH

Title card, "Army Planes Play Sub-Zero War Game" / [VO narration explaining gas-fueled heaters] VS airmen in the cold cluster around a cylindrical heater, warming their hands and boots / The airplane's motor is draped in a cloth as one of the heaters is removed from it / A line of airplanes in the snow, and more men gathered around a heater / [repeat footage] / A dog is fitted with small boots, and a man dons a heavy cloth 'coverall' with his face behind a clear plastic shield; a man wearing a leather helmet with ear coverings and a face mask / Note: exact day not known