0000944209-01-500425 S-4 14 20010523 NORTHROP GRUMMAN CORP /DE/ 0001133421 3812 954840775 DE 1231 S-4 33 333-61506 1646774 1840 CENTURY PK E C/O NORTHROP GRUMMAN CORP LOS ANGELES CA 90067 3105536262 1840 CENTURY PARK EAST C/O NORTHROP GRUMMAN CORP LOS ANGELES CA 90067 NNG INC 20010129 S-4 1 ds4.txt FORM S-4 EX-5.1 2 dex51.txt FORM OF OPINION OF JOHN H. MULLAN EX-8.1 3 dex81.txt OPINION OF FRIED, FRANK, HARRIS, SHRIVER, JACOBSON EX-15.1 4 dex151.txt LETTER FROM INDEPENDENT ACCOUNTANT EX-21.1 5 dex211.txt LIST OF SUBSIDIARIES EX-23.1 6 dex231.txt CONSENT OF DELOITTE & TOUCHE LLP EX-23.2 7 dex232.txt CONSENT OF DELOITTE & TOUCHE LLP EX-99.1 8 dex991.txt FORM OF LETTER OF ELECTION AND TRANSMITTAL EX-99.2 9 dex992.txt FORM OF NOTICE OF GUARANTEED DELIVERY EX-99.3 10 dex993.txt FORM OF LETTER TO BROKERS, DEALERS, ETC. EX-99.4 11 dex994.txt FORM OF LETTER TO CLIENTS EX-99.5 12 dex995.txt W-9 GUIDELINES EX-99.6 13 dex996.txt PRESS RELEASE DATED MAY 9, 2001 EX-99.7 14 dex997.txt PRESS RELEASE DATED MAY 21, 2001