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One of the highlights at the Changchun Air Show was a mesmerizing performance by 2,022 drones that lit up the night sky in northeastern China's Changchun City on August 25. A team of 100 people spent nearly two months preparing for the show. All the drones were computer-controlled, allowing them to follow tightly-choreographed maneuvers. The Changchun Air Show runs from August 26 to 30.