I am by no means sure. All I know is a ton of emergency vehicles, and I mean a lot maybe 25 or so were obviously waiting for an aircraft to land on 19R around 6:15 pm last Thursday. They like to position themselves at various points along the runway so if the airplane crashes they will not have to drive more than a quarter mile or so. After about 15 minutes of them sitting there with their lights flashing a NW Airlink CRJ landed safely on 19R, and as it taxied off the runway then all fire equipment went away. It is quite possible the emergency aircraft never came at all. Maybe it was a drill but the speed some of the trucks were going on the local highways said otherwise.