We have concluded on the merits that oral argument is unnecessary in this case. Accordingly, we have directed the Clerk to place the case on the Summary Calendar and to notify the parties of this fact in writing. See Huth v. Southern Pacific Co., 5 Cir. 1969, 417 F.2d 526; Murphy v. Houma Well Service, 5 Cir. 1969, 409 F.2d 804; 5th Cir. R. 18.

The National Labor Relations Board found that Red Arrow Freight Lines violated section 8(a) (3) and (1) of the National Labor Relations Act, 29 U.S.C. § 158(a) (3) and (1), by discriminatorily refusing to hire Lyal L. *36 Foster because of his actual or suspected membership in the Teamsters Union. 175 NLRB No. 160. The only question on review is whether substantial evidence on the record taken as a whole supports this conclusion. See NLRB v. Monroe Auto Equipment Co., 5 Cir. 1968, 392 F.2d 559.

On many of the factual questions, reasonable men might have reached different conclusions, and there were several credibility determinations to be made by the Trial Examiner. But there is ample evidence to support the findings.

Therefore, we enforce the order of the Board.