<P> Augmented reality and 5G technology were also incorporated in the event . The largest drone show in history, featuring 1,218 Shooting Star drones, was planned for the ceremony but cancelled at the last minute; television audiences were shown a version that had been recorded the previous December . </P> <P> During the opening ceremony the organizing committee was a victim of a cyber attack, but without major consequences . </P> <P> The Parade of Nations was led, according to custom due to hosting the original ancient Olympics, by the Greek team, followed by other competing countries in alphabetical order based on their names in the Korean language, with the host country, South Korea, concluding the march . </P> <P> The delegations from both the host nation South Korea and North Korea (Korea at the 2018 Winter Olympics) marched under the Korean unification flag . South Korean Won Yun - jong and North Korean Hwang Chung - gum both held the flagpole . </P>

When are the opening games of the olympics