Foo Fighters have released an EP titled 00050525 Live in Roswell, containing a June 18th, 2005 concert that the band played in Roswell, New Mexico, where a UFO allegedly crashed in 1947. The group has shared the EP to mark "Storm Area 51 Day," which took place on Friday (September 20th) and saw several hundred conspiracy theorists assemble at the gates of the famously secretive airbase.

While Area 51 is located in the Nevada desert, both it and Roswell have long been associated with alien and UFO conspiracy theories. Dave Grohl's record label is named Roswell Records, and the Foos themselves actually got their name from a term used by Allied aircraft pilots in World War II to describe UFOs.

Grohl has long been fascinated by UFOs and told us a while back how he even made a cameo in an episode of The X-Files called "Pusher": "I went up there to talk to (show creator) Chris Carter about doing a video for a song we put on the first X-Files record. I went up to the set to watch them film, I was standing there and the director said, 'Hey, do you want to be in a shot?' 'Yeah, sure, okay!' The scene begins and I'm standing behind the bad guy, and I walk off -- I'm onscreen for two seconds. You blink and you miss it."

The EP features seven songs, including renditions of "Monkey Wrench," "All My Life" and a 10-minute version of of "Stacked Actors." The band also shared an accompanying poster detailing proper behavior at "Storm Area 51 Day," including "Control yourself at the barbecue," "Should you encounter extraterrestrials, be polite" and,of course, "Rock out at all times."

"Storm Area 51 Day" began as a joke Facebook event to invade the once-secret Nevada military base and look for the alien bodies and technology rumored to be long stored there from the Roswell crash and other encounters. The event quickly went viral, garnering millions of RSVPs and prompting the Air Force to issue a warning against people assembling at the facility.

AUDIO: FOO FIGHTERS' DAVE GROHL RECALLS HIS 'X-FILES' CAMEO