The history of the most secret place on earth - subject of intense interest to all 'Stealthies', UFO buffs and X-Files fans. The US government only officially acknowledged the existence of Area 51 of Groom Dry Lake, Nevada in 1994, forty years after its first use as a secret testing ground for advanced aircraft. Area 51 is also widely acknowledged to contain the truth at the heart of the fifty year old mystery of the supposed alien landing at Roswell.