When an American Airplane Crashed Into a School in 1944, an English Village Lost Almost All of Its Youngest Children. Why Has WWII's Worst Civilian Aviation Accident Been Forgotten?
On August 23, 1944, a test flight over the village of Freckleton, located in northwest England, ended in disaster, claiming the lives of 61 people, including 38 students between the ages of 4 and 6
We haven't written up this one. Smithsonian has the full story — the link below goes straight to it.