Booming business

Down the road from here the French army has a good size shooting range, just east of Bourges. With a length of more than 35 kilometers it is perfect for practising with the larger models guns, canons, howitzers or whatever it is they use these days.
About once a month our windows rattle and the ground shakes. A deep booming thunder rolls through the valley as they let fly twenty or so shots that seem almost lazy in the way the sounds rumbles away. There is a strange reassurance in the violence of the explosion and the languid travel of the boom, as if it is enjoying the countryside as it goes