R.A.F. Attack Factory At Colombelles. A view of the cement works at Colmbelles after attack by the R.A.F. This picture of the huge cement factory at Colombelles show the deadly accuracy and the devastation that is left behind when R.A.F. heavy bombers pick out a target for elimination. The high points dominated out positions and were used as observation posts. "I was a mile away at the time, and dead on time the red markers went down right over the middle of the factory. Within 50 seconds the pl