Northrop Grumman announced today that it has extended the expiration of its pending exchange offer for all outstanding shares of TRW common and preferred stock by two weeks. Northrop filed a proposal to acquire TRW with the Securities and Exchange Commission last March, and is currently offering TRW shareholders $53 per share. The extension lasts until midnight Eastern Standard Time May 31. The two companies earlier this month signed an agreement that would allow Northrop access to TRW's internal financial...