President Trump, who was thought to have boarded the U.S. presidential aircraft Air Force One, had mysteriously vanished.

He had boarded a catering truck used for loading inflight meals and transferred to a different, smaller military aircraft.

This was a top-secret transport operation by the Secret Service after receiving intelligence regarding an assassination threat from Iran.

However, high-ranking officials and reporters left behind on Air Force One reportedly had no idea about this.

They ended up acting as a decoy flight without their knowledge, so let's take a closer look at what happened through the video.

(Reporting and Production: So Hwan-uk | Editing: Lee Ki-eun | Design: Cho Seung-hyun | Assistance: Kim Chae-hyun | Production: Intellectual Content IP Team)