Northrop Grumman official said that the construction of a new Air Force tanker in Mobile, Ala., could have an economic impact in south Mississippi of more than $12 million annually. Leroy Barnidge, vice president for state and local government relations in Melbourne, Fla., where Northrop's tanker program headquarters is located, spoke Wednesday to a Pascagoula civic club. Northrop-EADS plans an aircraft assembly center in Mobile estimated to cost $600 million and create more than 1,000 jobs. If the Northrop and EADS North America's joint tanker contract survives a protest by rival Boeing Co., Barnidge said a couple of hundred new...