back to ?al Hayburn's Case, 2 U.S. 408, 2 Dail. 409, I L.Ed. 436 (1792). A federal statute authorized courts to determine disability pensions for Revolutionary War veterans. ?'Mistretta v. United States, 488 U.S. 361. 402, 109 S.Ct. 647, 102 L.Ed.2d 714 (1989) (describing Hayburn's Case). These determinations