Perspectives piece by Neil Rolde, president of the Seacoast Shipyard Association, on the threat of closure that faces the Portsmouth Naval Shipyard, noting that Secretary of Defense Donald Rumsfeld shows a preference to private shipyards over public shipyards when awarding contracts. The Seacoast Shipyard Association has for the first time hired a Washington, D.C. lobbyist, Dale Gerry, to fight for the shipyard