CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 33-14504) of the Engineered Support Systems, Inc. Employee Stock Ownership Plan and the Registration Statements on Form S-8 (Nos. 33-77340, 33-77342, 333-27695 and 333-52753) of the 1992 Stock Option Plan for Nonemployee Directors, the 1993 Stock Option Plan, the 1997 Stock Option Plan for Nonemployee Directors, and the 1998 Stock Option Plan, respectively, of our report dated December 10, 1999, appearing on page 27 of the 1999 Annual Report to Shareholders of Engineered Support Systems, Inc. which is incorporated by reference in Engineered Support Systems, Inc.'s Annual Report on Form 10-K for the year ended October 31, 1999. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP St. Louis, Missouri January 28, 2000