>“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.”
A little critical thinking here.
People around antennas and work crews on towers. What are antennas on towers used for? Communications. Voice, Images, Data.
What are post offices for? Communications. Mail, mailing of objects like CD's, thumb drives, DVD's. Communications, recordings, images, data.
Now they've seized the post office in the closest adjoining town as well. What are they looking for?
Evacuee's being interviewed by government personnell (FBI?), no (medical) quarantine. No information to local LEO and apparently no leakage to news media from residents.
Are the residents interned? Incommunicado?
This isn't a "security" issue in the "hazard to public safety" vein. This is a security issue for the government.
Something was observed, documented, and was being promulgated and they brought the hammer down hard and fast to keep it from the public.
So. Secret space program?
Impending Solar catastrophe? Prevent panic?
Visitors?
Or a CYA operation so important to have them go full martial law on a small town?