Files reveal government's response to UFO sightings
Files released today reveal the Government's response to thousands of UFO sightings. They show that the government took the threat of UFOs so seriously in the 1950s that UK intelligence chiefs met to discuss the issue.
The papers also include a wartime account claiming prime minister Winston Churchill ordered a UFO sighting be kept secret to prevent "mass panic".
Anyone can now view the documents held by the National Archives on unexplained objects.
Tamsin Smith reports.