d.2d 11, 21(1976); Charles River Park "A", Inc. v. Department of Housing and Urban Development, 519 F.2d 935, 941('.1975); Superior Oil Co. v. Fed. Energy Reg. 563 F.2d 191, 204 (5th Cir.1977)). 5 EFTA00583103 Finally, the unsupported characterization of the mere fact of the existence or non-existence