EXHIBIT 99.26

                             POWER OF ATTORNEY
                             -----------------

     KNOW ALL PERSONS BY THESE PRESENTS that GOLDMAN,  SACHS & CO. oHG (the
"Company")  does  hereby  make,  constitute  and  appoint  each of Roger S.
Begelman,  Edward T. Joel and Ted  Chang,  (and any other  employee  of The
Goldman Sachs Group, Inc. or one of its affiliates designated in writing by
one of the  attorneys-in-fact),  acting  individually,  its true and lawful
attorney,  to execute and deliver in its name and on its behalf whether the
Company is acting  individually or as representative of others, any and all
filings  required to be made by the Company under the  Securities  Exchange
Act  of  1934,   as   amended,   giving   and   granting   unto  each  said
attorney-in-fact power and authority to act in the premises as fully and to
all intents and  purposes  as the Company  might or could do if  personally
present  by  one  of  its  authorized  signatories,  hereby  ratifying  and
confirming all that said attorney-in-fact  shall lawfully do or cause to be
done by virtue hereof.

     THIS POWER OF  ATTORNEY  shall  remain in full force and effect  until
either  revoked  in writing  by the  undersigned  or until such time as the
person or persons to whom power of attorney has been hereby  granted ceases
to be an  employee  of  The  Goldman  Sachs  Group,  Inc.  or  one  of  its
affiliates.

     IN WITNESS WHEREOF, the undersigned has duly subscribed these presents
as of August 5, 2004.


GOLDMAN, SACHS & CO. oHG



/s/ SABINE MOCK                             /s/ MICHAEL SCHRAMM
-----------------------------               -------------------------------
SABINE MOCK                                 MICHAEL SCHRAMM
Executive Director                          Executive Director