Hundreds of drones light up Seoul sky with virus messages

Hundreds of drones lit up the night sky in Seoul for a spectacular showcase of motivational and awareness messages as the world battles the coronavirus pandemic. Three hundred unmanned aerial vehicles were programmed to form images above the Han river — which runs through the South Korean capital — for the eyecatching flash mob. The show began with messages reminding people of key precautionary measures, including wearing masks, washing hands…