The existence of Area 51, the US airbase rumoured to house UFOs, along with details of some of the strange activities that went on there have been officially acknowledged in newly released CIA documents.
Its existence has been a badly kept secret for decades and it has fuelled the imaginations of conspiracy theorists and UFO hunters around the world.
Now the existence of Area 51 has been officially acknowledged by the Central Intelligence Agency and its exact location revealed in Nevada.
Documents released by the CIA also reveal that there really have been some strange occurrences at the secret airbase – however, they are not quite as exciting as UFO hunters would like.
Among the jobs that staff at the site had to perform during the 1960s was a routine of vacuuming the runway to allow experimental aircraft to take off without damaging their engines.