Complex sentence: There were a number of notorious accidents mainly involving returning bombers missing their runway, one bomber made it all the way back from Germany only to crash into a tree at Atley Hill, about away, all the crew were killed.
Split into simpler sentences: There were a number of notorious accidents mainly involving returning bombers missing their runway. One bomber made it all the way back from Germany only to crash into a tree at Atley Hill, about away; all the crew were killed.