At 67 years old, William Hardenburg would still jump out of bed in the middle of the night to respond to a fire. "He's irreplaceable," said his stepson Dan Van Fossen, who is fire chief of the Pattenburg Volunteer Fire Co. in Union Township, Hunterdon County. "He was right there, every call." Hardenburg, who was emergency management coordinator for Bethlehem Township, N.J., was struck by a vehicle and killed this morning, authorities said. He was clearing damage from Superstorm Sandy in front of a home on Route 617 when he was hit, authorities said. Van Fossen said his stepfather worked...