What the drone saw – video

In this new video installation by artist Omer Fast, a former US drone operator in Afghanistan and Pakistan reveals why 5,000 feet is the optimum flying height for a combat drone. It means he can make out a person's shoes and facial hair, and watch a cigarette flare like a beacon. His words take on an eerie nature as the camera tracks a cycling child from the same height

• 5,000 Feet Is the Best is the inaugural work on show in the IWM Contemporary programme of artworks that explore conflict. At Imperial War Museum, London, until 29 September