A research team set off for northern Sweden on Thursday to get to the bottom a "Ghost Rocket" sighting from 1980 that has been labelled as “the biggest UFO mystery in the world” and which the Swedish military kept classified for years.

The expedition leader and head of UFO-Sweden, Clas Svahn, set off on the trip to Jokkmokk, far northern Sweden on Thursday together with a support team, divers, a film crew, and the original witness who watched the craft land in the water.

“I expect to be surprised,” Svahn told The Local, explaining that while he is not a “believer”, he hopes that the trip can provide answers.

Good luck with that. They will be be watched very closely from afar. To read more, click here.