Exhibit (a)(20)

News Release                         TRW Inc.                 [TRW Logo]
                                     1900 Richmond Road
                                     Cleveland, OH 44124



    For Immediate Release               Contact
                                        Judy Wilkinson or Barrett Godsey
                                        Joele Frank, Wilkinson Brimmer Katcher
                                        212-355-4449

                                        Jay McCaffrey, TRW Media
                                        216-291-7179

                                        Ron Vargo, TRW Investors
                                        216-291-7506


TRW SENDS LETTER TO NORTHROP GRUMMAN

Terms Of Confidentiality Agreement Are Appropriate

Other Participant Has Signed Confidentiality Agreement

CLEVELAND, April 22, 2002 - TRW Inc. (NYSE: TRW) today sent the following
letter to Northrop Grumman Corporation (NYSE: NOC):

         April 22, 2002

         W. Burks Terry
         Corporate Vice President and General Counsel
         Northrop Grumman Corporation
         1840 Century Park East
         Los Angeles, CA  90067-2199

                   Re:  Confidentiality Agreement

         Dear Mr. Terry:

                  We are deeply disappointed that Northrop Grumman has
         chosen to negotiate the terms of our confidentiality agreement in
         the press. Let me set the record straight.

                  TRW is prepared to provide Northrop with access to the
         same information as it provides to other parties. The
         confidentiality agreement sent to all interested parties is
         designed to enable TRW to conduct a process that delivers to TRW
         shareholders the full value that they deserve from their
         investment. A confidentiality agreement has already been signed by
         a participant who will begin receiving information shortly.

                  Northrop has asserted that it wants to proceed with a
         negotiated transaction, yet has simultaneously insisted on
         maintaining full flexibility to pursue its hostile offer. Contrary
         to Northrop's protest, a standstill provision is perfectly
         appropriate under these circumstances. The integrity of our
         process is underscored by the fact that our confidentiality
         agreement did not seek to require Northrop to withdraw its offer
         or to preclude Northrop from continuing to solicit proxies at
         TRW's Annual or Special Meetings of Shareholders. Northrop's
         rhetoric is merely its latest attempt to influence shareholder
         votes at our Annual Meeting on Wednesday and to exert pressure on
         TRW's Board for the purpose of forcing an inadequate offer on
         TRW's shareholders.

                  TRW's Board of Directors has been clear all along - this
         is all about shareholder value. Unlike Northrop, we have a
         responsibility to act in the best interests of TRW shareholders.
         We are working to ensure that TRW shareholders receive the value
         that is rightfully theirs and Northrop does not have the right to
         define the playing field. TRW's Board of Directors has clearly
         demonstrated that it is willing to do what it takes to enhance
         shareholder value and our Board will continue to do so, regardless
         of Northrop's pressure tactics.

                  If Northrop is sincerely interested in accessing
         information and participating in a process that will give Northrop
         a real opportunity to make its best offer for TRW, TRW is more
         than happy to accommodate Northrop.

         Sincerely,
         /s/
         William B. Lawrence
         Executive Vice President, General Counsel and Secretary

TRW provides advanced-technology products and services for the aerospace,
systems, and automotive markets.



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