PASCAGOULA -- The Northrop Grumman-built amphibious transport dock ship Arlington will be christened on Saturday at 10 a.m. at the company’s shipyard in Pascagoula. The ship is named for the city of Arlington, Va., in honor of the 184 people who died when American Airlines Flight 77 crashed into the Pentagon on Sept. 11, 2001. The company said the ship also honors the military and civilian employees, emergency, fire and rescue personnel of Arlington County who provided assistance after the attack. The ship’s sponsor is Joyce Rumsfeld, wife of former Secretary of Defense Donald Rumsfeld. Arlington County Fire Chief...