Late in December, Mark, a United States embassy employee, moved from Germany to Maryland along with his family. He purchased a single-family house in Rockville. The real estate agent informed Mark that he had to replace the furnace. Mark looked online for a furnace and found a cost-effective Energy Star gas furnace he liked at the local Home Depot. When he arrived, the model he liked was sold out and would be available by late February. Mark needed a furnace unit immediately because of the severe cold weather during the winter season. The salesman informed him that a furnace was available at the Home Depot store in Fairfax, Virginia. Mark drove there and purchased the furnace set to be delivered and installed that weekend. A week later, while Mark and his wife were away at work and the kids at school, a fire formed in the cellar and progressed to the first and second floors, respectively. Mark's neighbor called the firefighters as the fire spread quickly through Mark's property, burning everything. Mark had an expert come to his home and determined that the furnace set off the fire, which caused damages amounting to $90,000. Mark took the Home Depot at Fairfax, Virginia, to a federal court.

Please identify the appropriate Rules of Civil Procedure

Please provide proper source and bluebook citation format for the source