This is very weird.
Update: https://www.kvia.com/news/top-stories/closure-of-national-solar-observatory-remains-shrouded-in-mystery/793035021
More details in this Sept 7 article
https://www.alamogordonews.com/story/news/local/2018/09/07/sunspot-observatory-south-cloudcroft-closed-due-security-issue/1227788002/
Otero County Sheriff Benny House said the Otero County Sheriff’s Office was asked to standby.
“The FBI is refusing to tell us what’s going on,” House said. “We’ve got people up there (at Sunspot) that requested us to standby while they evacuate it. Nobody would really elaborate on any of the circumstances as to why. The FBI were up there. What their purpose was nobody will say.”
He said he has a lot of unanswered question about what occurred at Sunspot.
“But for the FBI to get involved that quick and be so secretive about it, there was a lot of stuff going on up there,” House said. “There was a Blackhawk helicopter, a bunch of people around antennas and work crews on towers but nobody would tell us anything.”