For one reason or another, hackers love the Olympics just as much as the casual sports fan.
The 2018 Pyeongchang games started off with a massive cyber-attack that those watching at home may not have been aware of. The attack, which was forged by an unidentified hacker (presumably either Russia or North Korea) causing internet protocol TVs to malfunction at the main press center, which was countered by organizers shutting down the games' servers to prevent additional damage.
With the Olympics servers offline, Wi-Fi at the Olympic Stadium and the website went down, preventing attendees from printing tickets to events.
The opening ceremony was to feature drones filming the ceremony, but those were unable to deploy.
The source of the cyber-attack was not revealed, but organizers and the IOC have an idea of who orchestrated the attack. However, they won’t point the finger, instead citing poor international best-practices.