Military officials are investigating an incident during which an Air National Guard fighter pilot fired 20 mm rounds over South Jersey last night. The New Jersey Department of Military and Veterans Affairs Officials, in announcing a news conference for this afternoon, said only that the discharge of an undetermined number rounds occurred in the airspace for the Warren Grove target range in the Pine Barrens. But residents of Little Egg Harbor Township in Ocean County said investigators had converged on the Little Egg Harbor Intermediate School and that it apparently was related to the fighter jet incident. The military affairs...