No. 96-1190 Argued February 10, 1997 Decided May 27, 1997 Gerald M. Richardson, St. Louis, MO, argued the cause, for petitioner. Angela M. Washington, Attorney, National Labor Relations Board, argued the cause, for respondent. Linda R. Sher, Associate General Counsel, Aileen A. Armstrong, Deputy Associate General Counsel, and Frederick C. Havard, Attorney, National Labor Relations Board, were on brief. David A. Seid, Attorney, Washington, DC, National Labor Relations Board, entered an appearance