No. 91-2325. Submitted February 11, 1992. Decided May 6, 1992. Michael Gan, N.L.R.B., Washington, D.C., argued, for petitioners. Eric J. Snyder, St. Louis, Mo., argued, for respondents. Petition from National Labor Relations Board. Before McMILLIAN, LOKEN and HANSEN, Circuit Judges. McMILLIAN, Circuit Judge. The National Labor Relations Board (NLRB) has petitioned this court, under § 10(e) of the National Labor Relations Act (the Act), 29 U.S.C. § 160(e), for enforcement of its order against Cornerstone