Image by Flickr user AV8PIX Christopher Ebdon

If you looked up in the sky on Monday and thought you saw Air Force One roaring overhead, you were right.

The plane, which did not have any passengers on board, is one of two Boeing 747 aircraft assigned to the Presidential Airlift Group. And, according to the Air Force, “The particular plane seen at the base recently completed a year-long heavy maintenance cycle and is currently undergoing an operational testing regimen prior to being certified for return to presidential service,”

The Post and Courier has a bit more information on the plane itself, which you can find here.