By DAN SEWELL, Associated Press DAYTON, Ohio (AP) — Tormented by mind-scarring memories and questions without answers, Dion Green has dedicated his life after the death of his father and eight other people in a mass shooting in Dayton, Ohio, to memorializing them and trying to bring helpful change. “That purpose is my ‘Why?’” said Green, whose father died in his arms after he was caught in the barrage