"We will all meet up at the Area 51 Alien Center tourist attraction and coordinate our entry", according to the Facebook page.
The streamlined and unstoppable Naruto run. It involves Monster energy drinks, "Kyles" (the internet name for white men and boys who have anger issues and punch drywall) and Naruto-running, inspired by a Japanese anime show.
A prank event on Facebook that's attracted more than 1 million interested people suggests that a mass of people attempt to run into the mysterious site at 3 a.m. on September 20.
Area 51 is going to light up on September 20 for all the right reasons, with a huge crowd of people planning to storm Area 51 in Nevada.
Area 51 warning sign.
If you're seriously considering raiding a military base, you're going to get what's coming to you.
Turkish diplomat among two shot dead in Iraq's Erbil
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House votes to hold Barr, Ross in criminal contempt
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Kulbhushan Jadhav: International Court of Justice to rule on 'India spy' case
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Here's everything to know about the history of Area 51, and why more than a million people want to "see them aliens".
However, the BBC report quoted a Facebook user named Jackson Barnes as saying that the event was merely a joke and there was no intention to go ahead with the plan. "I just thought it would be amusing and get me some thumbsy uppies on the internet".
But as the event has gained traction - inspiring dozens of memes and jokes - the profile of the situation has risen, so much so that the US Air Force has been made aware of the potential impending raid.
The site is part of the vast Nevada Test and Training Range and has become the center of UFO conspiracy theories.
Yes. "The military is aware of the Facebook activity and has warned that any attempt to illegally access military installations or military training areas is risky", the New York Times report quoted the Air Force spokeswoman as saying.
It's being called a joke, but the event caught the attention of the U.S. Air Force. The area actually serves as an Air Force training range.
The Air Force did investigate UFOs under Project Blue Book from 1947 to 1969, but the project was headquartered at Wright-Patterson Air Force Base in OH, not at the range in Nevada.