At first only the local news reported this event when Sunspot National Observatory and the local Sunspot Post Office were shut down and evacuated using Black Hawk helicopters and FBI agents. Sunspot is not too far from Roswell and White Sands, so yes, there are lots of conspiracy theories floating around.
Then a week later, around September 12, the main stream media finally picked up the story.
Here is a more scientific video that explains why this Observatory was shut down. Again, this is only hypothetical, but it sounds more realistic than the theory that involves those little green leprechauns from Mars or Ireland.
Take a look.