Took this picture at Fort Knox a few years ago.  Every 4th of July there is a WW2 battle re-enactment with Shermans, half-tracks, self-propelled guns, and other ww2 vehicles.  
For some reason, a Cobra took off at the nearby field and swooped over the battleground.  The year after that, they had a P51 'strafe' the battlefield several times.  The sound of a merlin doing 400+ is incredible.