(Mountain Home, ID)  --  An Oregon State University Air Force ROTC cadet is dead following a training accident in Idaho.  East Idaho News reports 19-year-old Mackenzie Wilson was killed Friday afternoon during an accident involving a HUMVEE at Mountain Home Air Force Base.  Wilson was one of 19 cadets taking part in an immersive professional development training program called Operation Air Force.  An investigation into the accident is underway.