Watch: Dramatic visuals as mega sandstorm engulfs China’s ancient city

• A 300 meter high sandstorm engulfed ancient city of Dunhuang in North-West China. The sandstorm engulfed the expressway in a few minutes, turning the sky yellow and reduced the visibility to less than five meters, according to state media. Local traffic police imposed traffic control and directed stranded vehicles to leave the expressway. Watch the full video for more details.