“ This appeal is from a judgment of a three-judge District Court, 226 F.Supp. 521, dismissing appellants' complaint to set aside orders of the Interstate Commerce Commission, 317 I.C.C. 557, 729, relating to the Southern Railway Company's acquisition of control through stock ownership of the Central of Georgia Railway Company. Appellants, representing railway employees, object that under the Commission's orders, the employees are not protected as provided by §§ 4, 5, and 9 of the Washington Job Protection Agreement. ”