Estonia hosts NATO-led cyber war games 'Locked Shields' in Tallinn
An organisational chart of the NATO-led cyber war games 'Locked Shields 2023' is seen on a monitor, in Tallinn, Estonia April 18, 2023. Over 3,000 participants from 38 nations are taking part in the exercise, which involves protecting real computer systems from real-time attacks and simulating tactical and strategic decisions in critical situations, according to organizers. REUTERS/Ints Kalnins