EXHIBIT 4.17

                           AMENDED AND RESTATED BYLAWS
                                       OF
                          EG&G Defense Materials, Inc.

                               A Utah Corporation
                 (Amended and Restated as of September 9, 2004)

                                    * * * * *

                                    ARTICLE I

                                     OFFICES

      Section 1. The registered office shall be located in Salt Lake City, Utah.

      Section 2. The Corporation may also have offices at such other places both
within and without the State of Utah as the board of directors may from time to
time determine or the business of the corporation may require.

                                   ARTICLE II

                         ANNUAL MEETINGS OF SHAREHOLDER

      Section 1. All meetings of shareholders for the election of directors may
be held anywhere in the United States.

      Section 2. Annual meetings of shareholders, commencing with the year 1990,
shall be held on the 1st Monday in May if not a legal holiday, and if a legal
holiday, then on the next secular day following, at 10:00 A.M., at which they
shall elect by a plurality vote a board of directors, and transact such other
business as may properly be brought before the meeting.

      Section 3. Written or printed notice of the annual meeting stating the
place, day and hour of the meeting shall be delivered no less than ten nor more
than fifty days before the date of the meeting, either personally or by mail, by
or at the direction of the president, the secretary, or the officer or persons
calling the meeting, to each shareholder of record entitled to vote at such
meeting.

                                   ARTICLE III

                        SPECIAL MEETINGS OF SHAREHOLDERS

      Section 1. Special meetings of shareholders for any purpose other than the
election of directors may be held at such time and place within or without the
State of Utah as shall be stated in the notice of the meeting or in a duly
executed waiver of notice thereof.



      Section 2. Special meetings of the shareholders, for any purpose or
purposes may be called by the chairman of the board or the president and shall
be called by the president or secretary at the request in writing of a majority
of the board of directors, or at the request in writing of shareholders owning
one-tenth of all the outstanding shares of the corporation. Such request shall
state the purpose or purposes of the proposed meeting and business transacted at
any special meeting of shareholders shall be limited to the purposes stated in
the notice.

      Section 3. Written or printed notice of a special meeting stating the
place, day and hour of the meeting and the purpose or purposes for which the
meeting is called, shall be delivered not less than ten nor more than fifty days
before the date of the meeting, either personally or by mail, by or at the
direction of the president, the secretary, or the officer or persons calling the
meeting, to each shareholder of record entitled to vote at such meeting.

      Section 4. The business transacted at any special meeting of shareholders
shall be limited to the purposes stated in the notice.

                                   ARTICLE IV

                           QUORUM AND VOTING OF STOCK

      Section 1. The holders of a majority of the shares of stock issued and
outstanding and entitled to vote, represented in person or by proxy, shall
constitute a quorum at all meetings of the shareholders for the transaction of
business except as otherwise provided by statute or by the articles of
incorporation. If, however, such quorum shall not be present or represented at
any meeting of the shareholders, the shareholders present in person or
represented by proxy shall have power to adjourn the meeting from time to time,
without notice other than announcement at the meeting, until a quorum shall be
present or represented. At such adjourned meeting at which a quorum shall be
present or represented any business may be transacted which might have been
transacted at the meeting as originally notified.

      Section 2. If a quorum is present, the affirmative vote of a majority of
the shares of stock represented at the meeting shall be the act of the
shareholders unless the vote of a greater number of shares of stock is required
by law or the articles of incorporation.

      Section 3. Each outstanding share of stock, having voting power, shall be
entitled to one vote on each matter submitted to a vote at a meeting of
shareholders. A shareholder may vote either in person or by proxy executed in
writing by the shareholder or by his duly authorized attorney-in-fact.

      Section 4. Any action required to be taken at a meeting of the
shareholders may be taken without a meeting if a consent in writing, setting
forth the action so taken, shall be signed by all of the shareholders entitled
to vote with respect to the subject matter thereof.



                                    ARTICLE V

                                    DIRECTORS

      Section 1. The authorized number of directors shall be determined from
time to time by resolution of the board of directors, provided that the board of
directors shall consist of at least one member. Directors need not be residents
of the State of Utah nor shareholders of the corporation. The directors, other
than the first board of directors, shall be elected at the annual meeting of the
shareholders, and each director elected shall serve until the next succeeding
annual meeting and until his successor shall have been elected and qualified.
The first board of directors shall hold office until the first annual meeting of
shareholders.

      Section 2. Vacancies and newly created directorships resulting from any
increase in the number of directors may be filled by a majority of the directors
then in office, though less than a quorum, and the directors so chosen shall
hold office until the next annual election and until their successors are duly
elected and shall qualify.

      Section 3. The business affairs of the corporation shall be managed by its
board of directors which may exercise all such powers of the corporation and do
all such lawful acts and things as are not by statute or by the articles of
incorporation or by these by-laws directed or required to be exercised or done
by the shareholders.

      Section 4. The directors may keep the books of the corporation, except
such as are required by law to be kept within the state, outside of the State of
Utah, at such place or places as they may from time to time determine.

      Section 5. The board of directors, by the affirmative vote of a majority
of the directors then in office, and irrespective of any personal interest of
any of its members, shall have authority to establish reasonable compensation of
all directors for services to the corporation as directors, officers or
otherwise.

                                   ARTICLE VI

                       MEETINGS OF THE BOARD OF DIRECTORS

      Section 1. Meetings of the board of directors, regular or special, may be
held either within or without the State of Utah.

      Section 2. The first meeting of each newly elected board of directors
shall be held at such time and place as shall be fixed by the vote of the
shareholders at the annual meeting and no notice of such meeting shall be
necessary to the newly elected directors in order legally to constitute the
meeting, provided a quorum shall be present, or it may convene at such place and
time as shall be fixed by the consent in writing of all the directors.



      Section 3. Regular meetings of the board of directors may be held upon
such notice, or without notice, and at such time and at such place as shall from
time to time be determined by the board.

      Section 4. Special meetings of the board of directors may be called by the
president on two (2) days' notice to each director, either personally or by mail
or by telegram; special meetings shall be called by the president or secretary
in like manner and on like notice on the written request of two directors.

      Section 5. Attendance of a director at any meeting shall constitute a
waiver of notice of such meeting, except where a director attends for the
express purpose of objecting to the transaction of any business because the
meeting is not lawfully called or convened. Neither the business to be
transacted at, nor the purpose of, any regular or special meeting of the board
of directors need be specified in the notice or waiver of notice of such
meeting.

      Section 6. A majority of the directors shall constitute a quorum for the
transaction of business unless a greater number is required by law or by the
articles of incorporation. The act of a majority of the directors present at any
meeting at which a quorum is present shall be the act of the board of directors,
unless the act of a greater number is required by statute or by the articles of
incorporation. If a quorum shall not be present at any meeting of directors, the
directors present thereat may adjourn the meeting from time to time, without
notice other than announcement at the meeting, until a quorum shall be present.

      Section 7. Any action required or permitted to be taken at a meeting of
the directors may be taken without a meeting if a consent in writing, setting
forth the action so taken, shall be signed by all of the directors entitled to
vote with respect to the subject matter thereof.

                                   ARTICLE VII

                               EXECUTIVE COMMITTEE

      Section 1. The board of directors, by resolution adopted by a majority of
the number of directors fixed by the by-laws or otherwise, may designate two or
more directors to constitute an executive committee, which committee, to the
extent provided in such resolution, shall have and exercise all of the authority
of the board of directors in the management of the corporation, except as
otherwise required by law. Vacancies in the membership of the committee shall be
filled by the board of directors at a regular or special meeting of the board of
directors. The executive committee shall keep regular minutes of its proceedings
and report the same to the board when required.



                                  ARTICLE VIII

                                     NOTICES

      Section 1. Whenever, under the provisions of the statutes or of the
articles of incorporation or of these by-laws, notice is required to be given to
any director or shareholder, it shall not be construed to mean personal notice,
but such notice may be given in writing, by mail, addressed to such director or
shareholder, at his address as it appears on the records of the corporation with
postage thereon prepaid, and such notice shall be deemed to be given at the time
when the same shall be deposited in the United States mail. Notice to directors
may also be given by telegram.

      Section 2. Whenever any notice whatever is required to be given under the
provisions of the statutes or under the provisions of the articles of
incorporation or these by-laws, a waiver thereof in writing signed by the person
or persons entitled to such notice, whether before or after the time stated
therein, shall be deemed equivalent to the giving of such notice.

                                   ARTICLE IX

                                    OFFICERS

      Section 1. The officers of the corporation shall be chosen by the board of
directors and shall be a president, a vice-president, a secretary and a
treasurer. The board of directors may also choose additional vice-presidents,
and one or more assistant secretaries and assistant treasurers.

      Section 2. The board of directors at its first meeting after each annual
meeting of shareholders shall choose a president, one or more vice-presidents, a
secretary and a treasurer, none of whom need be members of the board.

      Section 3. The board of directors may appoint such other officers and
agents as it shall deem necessary who shall hold their offices for such terms
and shall exercise such powers and perform such duties as shall be determined
from time to time by the board of directors.

      Section 4. The salaries of all officers and agents of the corporation
shall be fixed by the board of directors.

      Section 5. The officers of the corporation shall hold office until their
successors are chosen and qualify. Any officer elected or appointed by the board
of directors may be removed at any time by the affirmative vote of a majority of
the board of directors. Any vacancy occurring in any office of the corporation
shall be filled by the board of directors.



                                  THE PRESIDENT

      Section 6. The president shall be the chief executive officer of the
corporation, shall preside at all meetings of the shareholders and the board of
directors, shall have general and active management of the business of the
corporation and shall see that all orders and resolutions of the board of
directors are carried into effect.

      Section 7. He shall execute bonds, mortgages and other contracts requiring
a seal, under the seal of the corporation, except where required or permitted by
law to be otherwise signed and executed and except where the signing and
execution thereof shall be expressly delegated by the board of directors to some
other officer or agent of the Corporation.

                               THE VICE-PRESIDENTS

      Section 8. The vice-president, or if there shall be more than one, the
vice-presidents in the order determined by the board of directors, shall, in the
absence or disability of the president, perform the duties and exercise the
powers of the president and shall perform such other duties and have such other
powers as the board of directors may from time to time prescribe.

                     THE SECRETARY AND ASSISTANT SECRETARIES

      Section 9. The secretary shall attend all meetings of the board of
directors and all meetings of the shareholders and record all the proceedings of
the meetings of the corporation and of the board of directors in a book to be
kept for that purpose and shall perform like duties for the standing committees
when required. He shall give, or cause to be given, notice of all meetings of
the shareholders and special meetings of the board of directors, and shall
perform such other duties as may be prescribed by the board of directors or
president, under whose supervision he shall be. He shall have custody of the
corporate seal of the corporation and he, or an assistant secretary, shall have
authority to affix the same to any instrument requiring it and when so affixed,
it may be attested by his signature or by the signature of such assistant
secretary. The board of directors may give general authority to any other
officer to affix the seal of the corporation and to attest the affixing by his
signature.

      Section 10. The assistant secretary, or if there be more than one, the
assistant secretaries in the order determined by the board of directors, shall,
in the absence or disability of the secretary, perform the duties and exercise
the powers of the secretary and shall perform such other duties and have such
other powers as the board of directors may from time to time prescribe.

                     THE TREASURER AND ASSISTANT TREASURERS

      Section 11. The treasurer shall have the custody of the corporate funds
and securities and shall keep full and accurate accounts of receipts and
disbursements in books belonging to the corporation and shall deposit all moneys
and other valuable effects in the name and to the credit of the corporation in
such depositories as may be designated by the board of directors.



      Section. 12. He shall disburse the funds of the corporation as may be
ordered by the board of directors, taking proper vouchers for such
disbursements, and shall render to the president and the board of directors, at
its regular meetings, or when the board of directors so requires, an account of
all his transactions as treasurer and of the financial condition of the
corporation.

      Section 13. If required by the board of directors, he shall give the
corporation a bond in such sum and with such surety or sureties as shall be
satisfactory to the board of directors for the faithful performance of the
duties of his office and for the restoration to the corporation, in case of his
death, resignation, retirement or removal from office, of all books, papers,
vouchers, money and other property of whatever kind in his possession or under
his control belonging to the corporation.

      Section 14. The assistant treasurer, or, if there shall be more than one,
the assistant treasurers in the order determined by the board of directors,
shall, in the absence or disability of the treasurer, perform the duties and
exercise the powers of the treasurer and shall perform such other duties and
have such other powers as the board of directors may from time to time
prescribe.

                                    ARTICLE X

                             CERTIFICATES FOR SHARES

      Section 1. The shares of the corporation shall be represented by
certificates signed by the president or a vice-president and the secretary or an
assistant secretary of the corporation, and may be sealed with the seal of the
corporation or a facsimile thereof.

      When the corporation is authorized to issue shares of more than one class
there shall be set forth upon the face or back of the certificate, or the
certificate shall have a statement that the corporation will furnish to any
shareholder upon request and without charge, a full statement of the
designations, preferences, limitations, and relative rights of the shares of
each class authorized to be issued and, if the corporation is authorized to
issue any preferred or special class in series, the variations in the relative
rights and preferences between the shares of each such series so far as the same
have been fixed and determined and the authority of the board of directors to
fix and determine the relative rights and preferences of subsequent series.

      Section 2. The signatures of the officers of the corporation upon a
certificate may be facsimiles if the certificate is countersigned by a transfer
agent, or registered by a registrar, other than the corporation itself or an
employee of the corporation. In case any officer who has signed or whose
facsimile signature has been placed upon such certificate shall have ceased to
be such officer before such certificate is issued, it may be issued by the
corporation with the same effect as if he were such officer at the date of its
issue.



                                LOST CERTIFICATES

      Section 3. The board of directors may direct a new certificate to be
issued in place of any certificate theretofore issued by the corporation alleged
to have been lost or destroyed. When authorizing such issue of a new
certificate, the board of directors, in its discretion and as a condition
precedent to the issuance thereof, may prescribe such terms and conditions as it
deems expedient, and may require such indemnities as it deems adequate, to
protect the corporation from any claim that may be made against it with respect
to any such certificate alleged to have been lost or destroyed.

                               TRANSFERS OF SHARES

      Section 4. Upon surrender to the corporation or the transfer agent of the
corporation of a certificate representing shares duly endorsed or accompanied by
proper evidence of succession, assignment or authority to transfer, a new
certificate shall be issued to the person entitled thereto, and that old
certificate cancelled and the transaction recorded upon the books of the
corporation.

                            CLOSING OF TRANSFER BOOKS

      Section 5. For the purpose of determining shareholders entitled to notice
of or to vote at any meeting of shareholders, or any adjournment thereof or
entitled to receive payment of any dividend, or in order to make a determination
of shareholders for any other proper purpose, the board of directors may provide
that the stock transfer books shall be closed for a stated period but not to
exceed, in any case, fifty days. If the stock transfer books shall be closed for
the purpose of determining shareholders entitled to notice of or to vote at a
meeting of shareholders, such books shall be closed for at least ten days
immediately preceding such meeting. In lieu of closing the stock transfer books,
the board of directors may fix in advance a date as the record date for any such
determination of shareholders, such data in any case to be not more than fifty
days and, in case of a meeting of shareholders, not less than ten days prior to
the date on which the particular action, requiring such determination of
shareholders, is to be taken. If the stock transfer books are not closed and no
record date is fixed for the determination of shareholders entitled to notice of
or to vote at a meeting of shareholders, or shareholders entitled to receive
payment of a dividend, the date on which notice of the meeting is mailed or the
date on which the resolution of the board of directors declaring such dividend
is adopted, as the case may be, shall be the record date for such determination
of shareholders. When a determination of shareholders entitled to vote at any
meeting of shareholders has been made as provided in this section, such
determination shall apply to any adjournment thereof.

                             REGISTERED SHAREHOLDERS

      Section 6. The corporation shall be entitled to recognize the exclusive
right of a person registered on its books as the owner of shares to receive
dividends, and to vote as such owner, and to hold liable for calls and
assessments a person registered on its books as the owner of shares, and shall
hot be bound to recognize any equitable or other claim to or interest in such
share or shares on the part of any other person, whether or not it shall have
express or other notice thereof, except as otherwise provided by the laws of
Utah.



                              LIST OF SHAREHOLDERS

      Section 7. The officer or agent having charge of the transfer books for
shares shall make, at least ten days before each meeting of shareholders, a
complete list of the shareholders entitled to vote at such meeting, arranged in
alphabetical order, with the address of each and the number of shares held by
each, which list, for a period of ten days prior to such meeting, shall be kept
on file at the registered office of the corporation and shall be subject to
inspection by any shareholder at any time during usual business hours. Such list
shall also be produced and kept open at the time and place of the meeting and
shall be subject to the inspection of any shareholder during the whole time of
the meeting. The original share ledger or transfer book, or a duplicate thereof,
shall be prima facie evidence as to who are the shareholders entitled to examine
such list or share ledger or transfer book or to vote at any meeting of the
shareholders.

                                   ARTICLE XI

                               GENERAL PROVISIONS

                                    DIVIDENDS

      Section 1. Subject to the provisions of the articles of incorporation
relating thereto, if any, dividends may be declared by the board of directors at
any regular or special meeting, pursuant to law. Dividends may be paid in cash,
in property or in shares of the capital stock, subject to any provisions of the
articles of incorporation.

      Section 2. Before payment of any dividend, there may he set aside out of
any funds of the corporation available for dividends such sum or sums as the
directors from time to time, in their absolute discretion, think proper as a
reserve fund to meet contingencies, or for equalizing dividends, or for
repairing or maintaining any property of the corporation, or for such other
purpose as the directors shall think conducive to the interest of the
corporation, and the directors may modify or abolish any such reserve in the
manner in which it was created.

                                     CHECKS

      Section 3. All checks or demands for money and notes of the corporation
shall be signed by such officer or officers or such other person or persons as
the board of directors may from time to time designate.

                                   FISCAL YEAR

      Section 4. The fiscal year of the corporation shall be fixed by resolution
of the board of directors.



                                      SEAL

      Section 5. The corporate seal shall have inscribed thereon the name of the
corporation, the year of its organization and the words "Corporate Seal, Utah".
The seal may be used by causing it or a facsimile thereof to be impressed or
affixed or in any manner reproduced.

                                   ARTICLE XII

                                   AMENDMENTS

      Section 1. These by-laws may be altered, amended, or repealed or new
by-laws may be adopted by the affirmative vote of a majority of the board of
directors at any regular or special meeting of the board.

      No by-law shall be adopted by the directors which shall require more than
a majority of the voting shares for a quorum at a meeting of shareholders, or
more than a majority of the votes cast to constitute action by the shareholders,
except where higher percentages are required by law or by the articles of
incorporation.

      The shareholders shall have the right to change or repeal any by-laws
adopted by the directors.