Exhibit  23.01


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of our
report  included  in  this  Form  10-K,  into  the  Company's  previously  filed
Registration  Statements on Form S-3, File Nos.  33-79794,  33-90734,  33-65333,
333-01595,  333-5185  and  333-17433,  and on Form S-8,  File nos.  33-89144 and
333-15369.




                                                ARTHUR ANDERSEN LLP


Washington, D.C.,
April 25, 1997