The refueller refuels two helicopters in the air at the same timeThe refueller refuels two helicopters in the air at the same time
Helicopter on the background of gloomy sky and smokeHelicopter on the background of gloomy sky and smoke
Unmanned aerial helicopter with real-time video shootingUnmanned aerial helicopter with real-time video shooting
Soviet single-engine aircraft flying in the cloudsSoviet single-engine aircraft flying in the clouds