AREA 51 is a highly classified area part of a detachment of the Edwards Air Force Base and within the Nevada Test and Training Range.
The CIA officially refers to it as Homey Airport but conspiracy theorists believe it is where the US government has carried out tests on aliens.
Where is Area 51?
Deep in the Nevada desert is the highly secretive base known as Area 51.
Located 100 miles north of Las Vegas in Nevada, it is classified as a US military installation.
The patch of fenced off land, measuring six by ten miles, is tucked between a US Air Force base and an abandoned nuclear testing ground.
What is Area 51?
For years the US government denied it even existed.
But in 2013 the CIA officially acknowledged its existence and its location was revealed.
Declassified documents reveal it was originally somewhere for the Army Air Corp pilots to practise their aerial gunnery.
During the Cold War experimental aircraft and weapons systems were tested here.
This included the high altitude U-2 spy plane.
Its current use is unknown and remains a top secret.
How is it connected to aliens?
The so-called Roswell incident is one of the most discussed and controversial UFO theories in history.
In July 1947 the military sensationally announced in a press release it had found the remains of a crashed flying saucer in the desert.
But the following day it retracted the statement, saying it was in fact a damaged US Air Force air balloon.
Yet as reported, Sheriff Jess Slaughter and Deputy Sheriff Charles Fogus were on duty in a patrol car on the night of the alleged incident.
Suddenly they heard reports of a crashed aircraft on their police radio.
In the interview Mr Fogus claims he saw a flying saucer smash into the side of a river bed and that the flying object was “100ft across”.
Describing the scene, he said: “When we got there, the land was covered with soldiers. They were hauling a big, creature.
“The bodies must have been 5 feet tall.
“I saw the legs and feet on some of them. They looked like our feet.”
What is Area 51? The top secret US air base steeped in extra-terrestrial intrigue
AREA 51 is a highly classified US air base in the remote Nevada desert.
It is officially known as Homey Airport, but gained its now famous name from CIA documents that referred to it by the codename Area 51.
The exact purpose of the air base is not known publicly, and the area is heavily restricted.
Trespassers can face huge fines and lengthy prison sentences for setting foot in the zone.
Purchased by the US government in 1955, evidence suggests the site is used as a testing area for experimental aircraft and weapons.
But the secrecy surrounding it has led conspiracy theorists to suggest the area is holding extra-terrestrial secrets.
Theories suggest engineers examine crashed spacecrafts — and even hold meetings with aliens from across the galaxy.
The crash of a weather balloon at Roswell, New Mexico in 1947 sparked wild theories of an alien ship crash.
Some have suggested Area 51 is still storing parts of the crashed ship — or even its alien inhabitants.
What are the other Roswell conspiracy theories?
As well as assessing alien technology it is often suggested that it is a place where meetings or joint undertakings with extraterrestrials occur.
Other theories suggest it has served as a research site for a range of exotic weapons and technologies.
This includes the development of time travel or teleportation technology
Another theory is that the much rumoured Aurora stealth plane is being tested here.
The most outlandish idea is that Area 51 is a base for a one world government.
What is the Storm Area 51 event?
More than 550,000 people have joined a Facebook group saying they intend to “storm” Area 5 1 on September 20, 2019.
The organisers – with their tongues firmly in their cheeks – created the page “Storm Area 51, They Can’t Stop All of Us,” calling for people to storm the location between 3am and 6am on the day.
The page adds: “We can move faster then their bullets.”
Organisers of the event are planning to start a “Naruto run,” as they approach the site, a term which refers to a Japanese anime style of running with the arms thrust backward and the head stretched forward.
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The page, in deadpan style, says: “Let’s see them aliens.”
Although the identity of the person who made the original post has not been revealed, they wrote on the pinned post: “Hello US government, this is a joke, and I do not actually intend to go ahead with this plan. I just thought it would be funny and get me some thumbsy uppies on the internet.
“I’m not responsible if people decide to actually storm area 51.”