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 2000, 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 19, 2004.


GS CAPITAL PARTNERS 2000, L.P.

By: GS Advisors 2000, L.L.C.


By: s/ John E. Bowman
- ---------------------------
Name:  John E. Bowman
Title: Vice President

EX-24

                                POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE  PRESENTS that GS CAPITAL  PARTNERS 2000 EMPLOYEE
FUND,  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 19, 2004.


GS CAPITAL PARTNERS 2000 EMPLOYEE FUND, L.P.

By: GS Employee Funds 2000 GP, L.L.C.


By: s/ John E. Bowman
- ---------------------------
Name:  John E. Bowman
Title: Vice President

EX-24

                                POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS that GS CAPITAL PARTNERS 2000 GMBH & CO.
BETEILIGUNGS KG (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 19, 2004.


GS CAPITAL PARTNERS 2000 GMBH & CO. BETEILIGUNGS KG

By: Goldman, Sachs Management GP GmbH


By: s/ John E. Bowman
- ---------------------------
Name:  John E. Bowman
Title: Managing Director

EX-24

                               POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS that GS CAPITAL  PARTNERS 2000 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,  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 19, 2004.


GS CAPITAL PARTNERS 2000 OFFSHORE, L.P.

By: GS Advisors 2000, L.L.C.


By: s/ John E. Bowman
- ---------------------------
Name:  John E. Bowman
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,  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  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

EX-24

                                POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE PRESENTS that GOLDMAN,  SACHS  MANAGEMENT GP GMBH
(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  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 19, 2004.


GOLDMAN, SACHS MANAGEMENT GP GMBH


By: s/ John E. Bowman
- ---------------------------
Name:  John E. Bowman
Title: Managing Director

EX-24

                                POWER OF ATTORNEY



     KNOW ALL PERSONS BY THESE  PRESENTS that GS EMPLOYEE  FUNDS 2000 GP, 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 19, 2004.



GS EMPLOYEE FUNDS 2000 GP, L.L.C.



By:      s/ Kaca B. Enquist
         ------------------------------------------------
         KACA B. ENQUIST, Vice President

EX-24

                                POWER OF ATTORNEY


     KNOW ALL PERSONS BY THESE  PRESENTS that STONE STREET FUND 2000,  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 23, 2004.


STONE STREET FUND 2000, L.P.
By: Stone Street 2000, L.L.C.


By: s/ Kaca B. Enquist
- ---------------------------------
Name:  Kaca B. Enquist
Title: Vice President