1941 THE RAF IS 23 THIS WEEK 1918 90 Birthday call for air crew volunteers A message to employers Just 23 years ago the R.A.F. came into being. At that time we were facing the darkest days of the Great War, when the Germans had broken the Western Front in their last desperate offensive. Today, during the critical period of another struggle, the R.A.F. is playing a foremost role. And, as the tempo of its mighty ex- pansion swells, so the need grows for air crews and still more air crews. That is why the R.