13G Filing: Iridian Asset Management and Armstrong World Industries Inc (NYSE:AWI)

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Item 10.
Certification
By  signing  below the  undersigned  certifies  that,  to the best of its or his 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 held for the  purpose of and do not have 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 such purpose or effect.
SIGNATURE
After reasonable inquiry and to the best of its or his knowledge and belief, we certify that the information set forth in this statement is true, complete and correct.
Date:   April 4, 2017
IRIDIAN ASSET MANAGEMENT LLC
By:
/s/ Jeffrey M. Elliott
_________________________
      Jeffrey M. Elliott
Title:
   Executive Vice President
David L. Cohen
By:
/s/ Jeffrey M. Elliott
_________________________
      Jeffrey M. Elliott
Title:
   Agent
Harold J. Levy
By:
/s/ Jeffrey M. Elliott
__________________________
      Jeffrey M. Elliott
Title:
   Agent

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