Restricted: The base is situated around 83 miles north of Las Vegas in the remote Nevada desert.
Faulkner described the site as “very difficult to move around”, adding that “white trucks follow us and hide when we record them”.
The trucks belong to base security - dubbed “Cammo dudes” - who are authorised to use deadly force against anyone caught trespassing.
The perimeter of the base also features warning signs, motion sensors and infra-red cameras.
In December last year, US Democratic presidential candidate Hillary Clinton told a journalist, Daymond Steer, from the Conway Daily Sun, she would send a “task force” into Area 51 and “get to the bottom of UFOs” if she is elected in November.
And the base was the inspiration behind Paranormal Activity director Oren Peli's movie of the same name, which came out last year.