EX-24

                                POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS that THE GOLDMAN SACHS GROUP,  INC. (the
"Company")  does hereby make,  constitute and appoint each of Roger S. Begelman,
Edward T. Joel,  Saskia Brookfield Martin 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, the "Act"), with respect to securities which may be deemed to
be  beneficially  owned by the Company  under the Act,  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  cease(s) 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 December 12, 2003.



THE GOLDMAN SACHS GROUP, INC.



By:      s/ Gregory K. Palm
         ------------------------------------------
Name:    GREGORY K. PALM
Title:   Executive Vice President and General Counsel

EX-24

                                POWER OF ATTORNEY


     KNOW  ALL  PERSONS  BY  THESE  PRESENTS  that  GOLDMAN,  SACHS  & CO.  (the
"Company")  does hereby make,  constitute and appoint each of Roger S. Begelman,
Edward T. Joel,  Saskia Brookfield Martin 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, the "Act"), with respect to securities which may be deemed to
be  beneficially  owned by the Company  under the Act,  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  cease(s) 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 November 19, 2003.



GOLDMAN, SACHS & CO.

By:      s/ Gregory K. Palm
         -----------------------------------
Name:    GREGORY K. PALM
Title:   Managing Director

EX-24

                               POWER OF ATTORNEY




     KNOW ALL PERSONS BY THESE PRESENTS that GS CAPITAL  PARTNERS III, L.P. (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.




GS CAPITAL PARTNERS III, L.P.
By: GS Advisors III, L.L.C.




s/ KACA B. ENQUIST
- ---------------------
KACA B. ENQUIST
Vice President

EX-24

                               POWER OF ATTORNEY



     KNOW ALL PERSONS BY THESE  PRESENTS that GS CAPITAL  PARTNERS III OFFSHORE,
L.P. (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 4, 2004.


GS CAPITAL  PARTNERS III  OFFSHORE,  L.P.
By: GS Advisors III, L.L.C.



/s/ KACA B. ENQUIST
- ------------------------------
KACA B. ENQUIST
Vice President

EX-24

                               POWER OF ATTORNEY



     KNOW ALL PERSONS BY THESE  PRESENTS that GS CAPITAL  PARTNERS III,  GERMANY
CIVIL LAW PARTNERSHIP  (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.


GS CAPITAL  PARTNERS III, GERMANY CIVIL LAW PARTNERSHIP
By: Goldman,  Sachs & Co. oHG
By:  Goldman,  Sachs & Co. Finanz GmbH


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

EX-24

                               POWER OF ATTORNEY





     KNOW ALL PERSONS BY THESE PRESENTS that BRIDGE STREET FUND 1998,  L.P. (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.




BRIDGE STREET FUND 1998, L.P.
By: Stone Street 1998, L.L.C.




/s/ KACA B. ENQUIST
- ------------------------------
KACA B. ENQUIST
Vice President

EX-24

                               POWER OF ATTORNEY






     KNOW ALL PERSONS BY THESE  PRESENTS that STONE STREET FUND 1998,  L.P. (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,  the
"Act"),  with respect to securities which may be deemed to be beneficially owned
by  the   Company   under  the  Act,   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  cease(s) 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.





STONE STREET FUND 1998,  L.P.
By: Stone Street 1998,  L.L.C.




By:     s/ KACA B. ENQUIST
        ---------------------
Name:   KACA B. ENQUIST
Title:  Vice President

EX-24

                               POWER OF ATTORNEY




     KNOW ALL  PERSONS BY THESE  PRESENTS  that GS  ADVISORS  III,  L.L.C.  (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,  the
"Act"),  with respect to securities which may be deemed to be beneficially owned
by  the   Company   under  the  Act,   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  cease(s) 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  4,  2004.



GS  ADVISORS   III,   L.L.C.




By: s/  KACA  B.  ENQUIST
    ------------------------------
Name:   KACA B. ENQUIST
Title:  Vice President

EX-24

                               POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE  PRESENTS  that STONE  STREET 1998,  L.L.C.  (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,  the
"Act"),  with respect to securities which may be deemed to be beneficially owned
by  the   Company   under  the  Act,   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  cease(s) 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.




STONE STREET 1998, L.L.C.


By:     s/ KACA B. ENQUIST
        ----------------------
Name:   KACA B. ENQUIST
        Title: Vice President

EX-24

                               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