Exhibit 15

CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
reports  included  in this  Form  10-Q,  into  the  Company's  previously  filed
Registration  Statement  File  No.  33-65418,  Registration  Statement  File No.
333-03289,  Registration  Statement File No. 333-03303,  Registration  Statement
File No.  333-10993,  Registration  Statement File No.  333-32170,  Registration
Statement  File  No.  333-53367,  Registration  Statement  File  No.  333-61598,
Registration Statement No. 333-73648,  Registration Statement No. 333-76288, and
Registration Statement No. 333-76316.





Albuquerque, New Mexico
May 15, 2002