Waves of drone and missile attacks targeted Kyiv and other Ukrainian cities overnight into Friday in the largest aerial attack since Russia's invasion began more than three years ago. Russia launched 550 drones and missiles across Ukraine during the night, the country's air force said. Read more: http://www.cbc.ca/news »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX