Joint Base Andrews in Prince George’s County, Maryland — where Air Force One resides — had an active shooter scare Thursday morning that, thankfully, wound up being nothing at all.

Turns out, the following tweets were the product of a shooting drill that a bunch of people at the base took to be a real crisis, i.e. a “lone wolf” shooter looking to do harm.

The strange thing about it is though, it was also originally reported that the same folks who sounded the alarm knew that there was a drill going on, but still decided to push it to the side and announce that the emergency at hand was anything but …

About an hour later, this was reported, by a familiar outside news source:

A misunderstanding. Thankfully.

For posterity, it came a half hour after this announcement from the base itself (which didn’t inform whether there was ever a shooter at all):

Foxtrot Alpha