0000930661-01-502477 S-4/A 5 20011120 NORTHROP GRUMMAN CORP /DE/ 0001133421 3812 954840775 DE 1231 S-4/A 33 333-61506 1796847 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/A 1 ds4a.txt FORM S-4 AMENDMENT #7 EX-15.1 3 dex151.txt LETTER FROM INDEPENDENT ACCOUNTANT EX-23.1 4 dex231.txt CONSENT OF DELOITTE & TOUCHE LLP EX-23.2 5 dex232.txt CONSENT OF DELOITTE & TOUCHE LLP EX-23.5 6 dex235.txt CONSENT OF ARTHUR ANDERSEN LLP (FOR NEWPORT NEWS)