CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
Published on March 30, 2000
EXHIBIT 23.1
CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
As independent public accountants, we hereby consent to the incorporation by
reference into the Company's previously filed Registration Statement on Form
S-8 (File No. 333-16837) of our report included in this Form 11-K.
/s/ ARTHUR ANDERSEN LLP
Vienna, Virginia
March 27, 2000