During WW II some teens kids were sent out on missions on fighters whith 20 hours TT, the attrition rate was atrocious .
I read somewhere long ago that the B17 attrition rate was around 60% with vast majority not due enemy fire but due to in flight collisions and on approach landing due bad weather.
Wikipedia says that the average life a B17 during the war was 13 missions.
Just to put things back into perspective.
