I heard an aircraft come over here that sounded different from what I'm used to hearing. Flightradar24 says it is a Dornier C-146A Wolfhound from Duke Field north of Elgin Air Force Base. Wiki says both the planes and the field are used by Special Forces. It is circling around flying approaches and/or touch and gos at local airport which was formerly an Air Force Base. At same time, noticed a Boeing C-40A Clipper fly over.