No. 95-60358. July 16, 1996. Stephen W. Smith, Fulbright Jaworski, Houston, TX, for respondents. Aileen A. Armstrong, Deputy Associate General Counsel, Peter David Winkler, Julie Brock Broido, National labor Relations Board, Washington, DC, Michael Dunn, Director, National Labor Relations Board, Fort Worth, TX, for NLRB. Howard Shapiro, McCalla, Thompson, Pyburn, Hymowitz Shapiro, New Orleans, LA, for The Thrift Plan of Exxon Corporation, A Part of the Benefit Plan of Exxon Corporation and participating