The UFO, which is the size of a football field, is reportedly located in a mountain in Seoul, according to an ex-intelligence community whistleblower Dr Steven Greer. (Video from 2019.)

https://www.youtube.com/watch?v=YbwQRZ7tXgY&ab_channel=Dr.StevenGreer Dr Steven Greer talks about an UFO in a mountain in Seoul at 31:30 which is a US asset. 32:45 (1/3)- list of all military facilities storing downed UFO crafts and biological ETs. 41.47 (2/3)- more lab facilities. 45:20 (3/3) list of corporations working with UFO reverse engineering. The whole video is informative and fascinating and is meant to spread disclosure awareness and prevent disclosure panic. Highly recommend. Dr Steven Greer is a volunteer and a consultant to the US gov. representatives, congress members, CIA directors and international political figures (etc) on the subject of UFO and ET technology and disclosure which is why I used him as a source.