https://197lines.com/last-year-several-north-korean-drones-entered-the-republic-of-koreas-airspace-and-even-violated-a-no-fly-zone-near-the-presidential-office-this-is-likely-to-further-complicate-relations-between-the-two-countries-this-year
Last year, several North Korean drones entered the Republic of Korea's airspace and even violated a no-fly zone near the presidential office; this is likely to further complicate relations between the two countries this year