As the fire and homicide investigation continues, officials say several firefighters were exposed to cyanide gas in two separate incidents as they were mopping up hot spots near the small city of Acton on the northern edge of the massive blaze. The poisonous cyanide fumes are suspected in acute breathing problems suffered by Los Angeles firefighters battling the Station Fire in the Aliso Canyon. One firefighters suffered life-threatening respiratory arrest and remains in hospital after she was knocked out by noxious fumes on Sept. 1 near Acton. Two days later, six firefighters suffered severe breathing difficulties in another part of...