SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

____________________

SCHEDULE 13G
(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. )*

NRG ENERGY
___________________________________________________________
(Name of Issuer)

COMMON STOCK
___________________________________________________________
(Title of Class of Securities)

629377508
______________________________
(CUSIP Number)

June 12, 2007
___________________________________________________________
(Date of Event Which Requires Filing of this Statement)

Check the  appropriate  box to designate  the Rule  pursuant to which
this Schedule is filed:

[X] Rule 13d - 1(b)
[ ] Rule 13d - 1(c)
[ ] Rule 13d - 1(d)

*    The  remainder  of this  cover  page  shall be filled  out for a
reporting  person's  initial  filing on this form with respect to the
subject  class  of  securities,  and  for  any  subsequent  amendment
containing  information which would alter  disclosures  provided in a
prior cover page.

The  information  required on the  remainder  of this page shall
not be deemed to be  "filed"  for the  purpose  of  Section 18 of the
Securities  Exchange Act of 1934 ("Act") or otherwise  subject to the
liabilities  of that  section  of the Act but shall be subject to all
other provisions of the Act (however, see the Notes.)

-----------------                          --------------
CUSIP         No            13G            Page 2 of 17
629377508                                      Pages
-----------------                          --------------

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

Bank of America Corporation
56-0906609

---------------------------------------------------------
---------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
0
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
11,914,620*
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE                     0
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE         17,827,282*
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
17,827,282*
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.35%*
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

HC
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

* Note:  Includes  shares held in separately  managed account ("SMA")
programs  over  which  unaffiliated   managers  exercise   investment
discretion  and voting  power and over which,  in certain  instances,
the reporting  entity has  concluded  that it also could be deemed to
have shared  investment  discretion and voting power for the purposes
of this  report.  May also include  shares held in SMA programs  over
which  unaffiliated   managers  exercise  investment  discretion  and
voting power,  and over which the reporting  entity does not exercise
shared investment discretion and voting power.

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

NB Holdings Corporation
56-1857749

---------------------------------------------------------
---------------------------------------------------------
2    CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF A
GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
0
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
11,914,598*
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE                     0
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE         11,914,636*
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
11,914,636*
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

4.92%*
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

HC
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

* Note:  Includes  shares held in separately  managed account ("SMA")
programs  over  which  unaffiliated   managers  exercise   investment
discretion  and voting  power and over which,  in certain  instances,
the reporting  entity has  concluded  that it also could be deemed to
have shared  investment  discretion and voting power for the purposes
of this  report.  May also include  shares held in SMA programs  over
which  unaffiliated   managers  exercise  investment  discretion  and
voting power,  and over which the reporting  entity does not exercise
shared investment discretion and voting power.

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

Bank of America, NA
94-1687665

---------------------------------------------------------
---------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

United States
---------------------------------------------------------
---------------------------------------------------------
1,004,417
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
192,302*
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE             1,004,417
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE             192,264
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
1,004,417*
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0.41%*
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

BK
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

* Note:  Includes  shares held in separately  managed account ("SMA")
programs  over  which  unaffiliated   managers  exercise   investment
discretion  and voting  power and over which,  in certain  instances,
the reporting  entity has  concluded  that it also could be deemed to
have shared  investment  discretion and voting power for the purposes
of this  report.  May also include  shares held in SMA programs  over
which  unaffiliated   managers  exercise  investment  discretion  and
voting power,  and over which the reporting  entity does not exercise
shared investment discretion and voting power.

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

Banc of America Securities Holdings Corporation
56-2103478

---------------------------------------------------------
---------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
0
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
10,717,917
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE                     0
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE          10,717,917
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
10,717,917
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

4.42%
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

HC
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

Banc of America Securities LLC
56-2058405

---------------------------------------------------------
---------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
10,717,917
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
0
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE            10,717,917
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE                   0
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
10,717,917
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

4.42%
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

BD
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

NMS Services Inc.
52-2082247

---------------------------------------------------------
---------------------------------------------------------
2    CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF A
GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
0
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
0
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE                     0
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE         5,912,700**
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
5,912,700**
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

2.42%**
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

CO
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

** Note:  The filing of this statement shall not be construed as an
admission that Bank of America Corporation is for the purposes of
Section 13(d) or 13(g) of the Act, the beneficial owner of any
securities covered by this statement.

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

Columbia Management Group, LLC
94-1687665

---------------------------------------------------------
---------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
0
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
192,248
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE                     0
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE             192,248
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
192,248
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0.08%
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

PN
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

---------------------------------------------------------
1    NAMES OF REPORTING PERSONS
I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
(ENTITIES ONLY):

Columbia Management Advisors, LLC
94-1687665

---------------------------------------------------------
---------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3    SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
192,248
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
0
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE               192,248
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE                   0
POWER
---------------------------------------------------------
---------------------------------------------------------
9    AGGREGATE  AMOUNT   BENEFICIALLY  OWNED  BY  EACH
REPORTING PERSON
192,248
---------------------------------------------------------
---------------------------------------------------------
10   CHECK  IF  THE   AGGREGATE   AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

0.08%
---------------------------------------------------------
---------------------------------------------------------
12   TYPE OF REPORTING PERSON*

PN
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

---------------------------------------------------------
1      NAMES OF REPORTING PERSONS
I.R.S.  IDENTIFICATION  NO. OF ABOVE  PERSONS
(ENTITIES ONLY):

Banc of America Investment Advisors, Inc
06-1143089

---------------------------------------------------------
---------------------------------------------------------
2      CHECK  THE  APPROPRIATE  BOX IF A MEMBER OF A
GROUP*
(a) [ ]
(b) [ ]
---------------------------------------------------------
---------------------------------------------------------
3      SEC USE ONLY

---------------------------------------------------------
---------------------------------------------------------
4      CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware
---------------------------------------------------------
---------------------------------------------------------
0
5  SOLE VOTING POWER
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON WITH

---------------------------------------------------------
---------------------------------------------------------
38*
6  SHARED VOTING POWER
---------------------------------------------------------
---------------------------------------------------------

7  SOLE DISPOSITIVE                     0
POWER
---------------------------------------------------------
---------------------------------------------------------
8  SHARED DISPOSITIVE                   0
POWER
---------------------------------------------------------
---------------------------------------------------------
9     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH
REPORTING PERSON
38*
---------------------------------------------------------
---------------------------------------------------------
10     CHECK  IF THE  AGGREGATE  AMOUNT  IN  ROW  (9)
EXCLUDES CERTAIN SHARES*

[  ]
---------------------------------------------------------
---------------------------------------------------------
11     PERCENT OF CLASS  REPRESENTED BY AMOUNT IN ROW
(9)

0.00%*
---------------------------------------------------------
---------------------------------------------------------
12     TYPE OF REPORTING PERSON*

IA
---------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!

* Note:  Includes  shares held in separately  managed account ("SMA")
programs  over  which  unaffiliated   managers  exercise   investment
discretion  and voting  power and over which,  in certain  instances,
the reporting  entity has  concluded  that it also could be deemed to
have shared  investment  discretion and voting power for the purposes
of this  report.  May also include  shares held in SMA programs  over
which  unaffiliated   managers  exercise  investment  discretion  and
voting power,  and over which the reporting  entity does not exercise
shared investment discretion and voting power.

Item 1(a).    Name of Issuer:

NRG Energy Inc

Item 1(b).    Address of Issuer's Principal Executive Offices:

211 Carnegie Center
Princeton, NJ  08540

Item 2(a).    Name of Person Filing:

Bank of America Corporation
NB Holdings Corporation
Bank of America N.A.
Banc of America Securities Holdings Corporation
Banc of America Securities LLC
NMS Services Inc.
Columbia Management Group, LLC
Columbia Management Advisors, LLC
Banc of America Investment Advisors

Item 2(b).    Address  of  Principal  Business  Office  or,  if None,
Residence:

Each  Reporting  Person  has its or his  principal  business
office at 100 North Tryon Street,  Floor 25, Bank of America
Corporate Center, Charlotte, NC 28255.

Item 2(c).    Citizenship:

Bank of America Corporation     Delaware
NB Holdings Corporation         Delaware
Bank of America N.A.            United States
Banc of America Securities Holdings Corporation   Delaware
Banc of America Securities LLC  Delaware
NMS Services Inc.               Delaware
Columbia Management Group, LLC  Delaware
Columbia Management Advisors, LLC   Delaware
Banc of America Investment Advisors, Inc Delaware

Item 2(d).    Title of Class of Securities:

Common Stock

Item 2(e).    CUSIP Number:

629377508

Item 3.  If This  Statement is Filed  Pursuant to Rule  13d-1(b),  or
13d-2(b) or (c), Check Whether the Person Filing is a:

(a)  [ ] Broker or dealer  registered  under  Section 15  of
the Exchange Act.
(b)  [  ]  Bank  as  defined  in   Section 3(a)(6)   of  the
Exchange Act.
(c)  [ ]  Insurance  company as defined in  Section 3(a)(19)
of the Exchange Act.
(d)  [ ] Investment  company  registered  under Section 8 of
the Investment Company Act.
(e)  [  ]  An   investment   adviser  in   accordance   with
Rule 13d-1(b)(1)(ii)(E).
(f)  [ ] An  employee  benefit  plan  or  endowment  fund in
accordance with Rule 13d-1(b)(1)(ii)(F).
(g)  [X] A parent  holding  company  or  control  person  in
accordance with Rule 13d-1(b)(1)(ii)(G).
(h)  [ ] A savings  association  as defined in  Section 3(b)
of the Federal Deposit Insurance Act.
(i)  [  ]  A  church   plan  that  is   excluded   from  the
definition  of  an  investment  company  under  Section
3(c)(14) of the Investment Company Act.
(j)  [  ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c),  check
this box.  [  ]

Item 4.  Ownership:

With respect to the  beneficial  ownership of the  reporting
person,  see Items 5 through  11 of the cover  pages to this
Schedule 13G, which are incorporated herein by reference.

Item 5.  Ownership of Five Percent or Less of a Class:

If this  statement is being filed to report the fact that as
of the date  hereof  the  reporting  person has ceased to be
the beneficial  owner of more than five percent of the class
of securities, check the following  [    ].

Item 6.  Ownership  of More than Five  Percent  on Behalf of  Another
Person:

Not applicable.

Item 7.  Identification  and  Classification  of the Subsidiary Which
Acquired  the  Security  Being  Reported  on by  the  Parent
Holding Company or Control Person:

With    respect    to    Subsidiary    Identification    and
Classification,  see Items 5 through  11 of the cover  pages
to this  Schedule  13G,  which  are  incorporated  herein by
reference.

Item 8.  Identification and Classification of Members of the Group:

Not applicable.

Item 9.  Notice of Dissolution of Group:

Not applicable.

Item 10. Certification:

By signing below each of the undersigned  certifies that, to
the best of such  undersigned's  knowledge  and belief,  the
securities  referred to above were  acquired and are held in
the  ordinary  course of business  and were not acquired and
are not for the  purpose of or with the  effect of  changing
or  influencing  the control of the issuer of the securities
and were not  acquired and are not held in  connection  with
or as a participant in any  transaction  having that purpose
or effect.

SIGNATURE

After reasonable  inquiry and to the best of my knowledge and belief,
I certify that the  information  set forth in this statement is true,
complete and correct.

Dated:   June 29, 2007

Bank of America Corporation
NB Holdings Corporation
Bank of America NA

By:      /s/ Charles F. Bowman
_____________________
Charles F. Bowman
Senior Vice President

Columbia Management Group, LLC
Columbia Management Advisors, LLC

By:      /s/ Keith Banks
_____________________
Keith Banks
President

Banc of America Securities Holdings Corporation

By:      /s/ Robert Qutub
_____________________
Robert Qutub
President

Banc of America Securities LLC

By:      /s/ Michael B. Radest
_____________________
Michael B. Radest
Senior Vice President

NMS Services Inc.

By:      /s/ Matthew Smith
_____________________
Matthew Smith
Vice President

Banc of America Investment Advisors, Inc

By:      /s/ Daniel S. McNamara
_____________________
Daniel S. McNamara
President

Exhibit 99.1

EXHIBIT 99.1 - JOINT FILING AGREEMENT

The   undersigned   hereby  agree  that  they  are  filing  this
statement  jointly  pursuant  to  Rule  13d-1(k)(1).  Each of them is
responsible  for  the  timely  filing  of such  Schedule  13G and any
amendments  thereto,  and for the  completeness  and  accuracy of the
information  concerning such person  contained  therein;  but none of
them  is  responsible  for  the   completeness  or  accuracy  of  the
information  concerning the other persons  making the filing,  unless
such person knows or has reason to believe that such  information  is
inaccurate.

In  accordance  with  Rule  13d-1(k)(1)  promulgated  under  the
Securities  and Exchange  Act of 1934,  as amended,  the  undersigned
hereby  agree to the joint  filing  with each other on behalf of each
of them of to such a statement  on Schedule  13G with  respect to the
common  stock  of  beneficially  owned by each of  them.  This  Joint
Filing  Agreement  shall be included  as an exhibit to such  Schedule
13G.

Dated:   June 29, 2007

Bank of America Corporation
NB Holdings Corporation
Bank of America NA

By:      /s/ Charles F. Bowman
_____________________
Charles F. Bowman
Senior Vice President

Columbia Management Group, LLC
Columbia Management Advisors, LLC

By:      /s/ Keith Banks
_____________________
Keith Banks
President

Banc of America Securities Holdings Corporation

By:      /s/ Robert Qutub
_____________________
Robert Qutub
President

Banc of America Securities LLC

By:      /s/ Michael B. Radest
_____________________
Michael B. Radest
Senior Vice President

NMS Services Inc.

By:      /s/ Matthew Smith
_____________________
Matthew Smith
Vice President

Banc of America Investment Advisors, Inc

By:      /s/ Daniel S. McNamara
_____________________
Daniel S. McNamara
President