Exhibit 24 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report dated March 15, 1996, included in this Form 10-K/A, into the Company's previously filed Amendment No. 3 to Form S-4 Registration Statement No. 33-21412 and Amendment No. 1 to Form S-8 Registration Statement No. 33-24927. Washington, D.C., ARTHUR ANDERSEN LLP May 6, 1996