1syuzh. - Kennel of service dogs of the N border school: training and maintenance of service dogs. 2syuzh. - Pilots of the squadron them. The Ivanovo proletariat is preparing to fly, taking planes into the air. 3syuzh. - Cadets of the Voronezh Aero Club are preparing for training flights, lifting planes into the air. 4syuzh. -Instructional plot dedicated to the flight of an airplane.