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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 height5,000 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