POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby
constitutes and appoints each of J. Mark Hollingsworth, A.
Andrew R. Louis, and Sandra K. Myers signing singly, his/her
true and lawful attorney-in-fact to

(1) execute for and on behalf of the undersigned Forms 3, 4 and
5 in accordance with Section 16(a) of the Securities Exchange
Act of 1934, as amended (the "Act"), and the rules thereunder;

(2) do and perform any and all acts for and on behalf of the
undersigned that may be necessary or desirable to complete the
execution of any such Forms 3, 4 or 5 and the timely filing of
such form with the United States Securities and Exchange
Commission and any other authority; and

(3) take any other action of any type whatsoever in connection
with the foregoing that in the opinion of such attorney-in-fact
may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such
attorney-in-fact may approve in his/her discretion.

The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform all and every act and
thing whatsoever requisite, necessary and proper to be done in
the exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as such attorney-in-fact might
or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all
that such attorney-in-fact, or his/her substitute or
substitutes, shall lawfully do or cause to be done by virtue of
this Power of Attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-in-
fact, in serving such capacity at the request of the
undersigned, are not assuming any of the undersigned's
responsibilities to comply with Section 16 of the Act.

EXECUTED as of this 27th day of September 2002.

/s/ J. Walter Tucker, Jr.
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Signature

J. Walter Tucker, Jr.
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Printed Name