Merrimack, NH - Merrimack firefighters arrived to find fire showing from the 'Alpha' side of a house on December 2nd. Command quickly struck a second-alarm, bringing in mutual aid to the scene and to cover the town. Crews made an aggressive interior attack to knock down the main body of fire. Merrimack crews rescued one occupant from the building. Nashua L1 performed ventilation. Crews had the fire knocked down a short time later. The cause of the fire is under investigation.