This suit was brought by Colorado against the United States, in the federal court for that State, to enjoin and set aside, in part, an order of the Interstate Commerce Commission issued February 11, 1924. The order is a certificate that present and future public convenience and necessity permit the abandonment by the Colorado & Southern Railway Company, six months thereafter, of a branch line located wholly in that State. The certificate was issued under Interstate Commerce Act, ? 1, pars. 18-20, as amended by Transportation Act, 1920, c. 91, ? 402, 41 Stat. 456, 477.
