Unmanned aerial helicopter with real-time video shootingUnmanned aerial helicopter with real-time video shooting
The refueller refuels two helicopters in the air at the same timeThe refueller refuels two helicopters in the air at the same time
The landscape of an unknown lake where only trees are visibleThe landscape of an unknown lake where only trees are visible
The calm surface of the evening river reflecting the skyThe calm surface of the evening river reflecting the sky