Northrop Grumman Corporation and Newport News Shipbuilding Inc. announced today that they have signed a definitive agreement under which Northrop Grumman will acquire Newport News Shipbuilding. The boards of directors of both companies approved the terms of the transaction in which Northrop Grumman will acquire all the outstanding shares of Newport News. $67.50, subject to certain limitations and proration procedures. Northrop Grumman expects to promptly amend its existing offer documents in order to reflect the merger agreement. Shipbuilding shareholders will have the same right to elect to receive cash or shares of Northrop Grumman stock as described above. Kent Kresa, Northrop Grumman chairman and chief executive officer.