Narrated by one of the men charged with manning these wartime batteries, we take a look at the efforts made by these teams - from all walks of life - who must get their shells from 0-30,000 feet in thirty seconds so as to hit, or deter at least, the Nazi bombers travelling at speeds of two hundred miles-per-hour on attack runs over British towns, cities and industrial targets. It demonstrates quite a bit of the science, of the sighting technology and he points out that they don’t even have to be able to see the enemy to make a solid fist of sending him home with his tail between his legs (if, i...