The 1914-18 conflict narrated through the voices of the men whose combat was in the air. The empty chairs belonged, all too briefly, to the doomed young First World War airmen who failed to return from the terrifying daily aerial combats above the trenches of the Western Front. The edict of their commander-in-chief was the missing aviators were to be immediately replaced. Before the new faces could arrive, the departed men's vacant seats at the squadron dinner table were sometimes poignantly occupied by their caps and boots, placed there in a sad ritual by their surviving colleagues as they drank to their memory. Life for most of the pilots of the Royal Flying Corps was appallingly short. If they graduated alive and unmaimed from the flying training that killed more than half of them before they reached the front line, only a few would for very long survive the daily battles they fought over the ravaged moonscape of no-man's-land. Their average life expectancy at the height of the war