Authorities Cited: United States Code 29 U.S.C. § 623(a) Supreme Court 411 U.S. 792 434 U.S. 575, 584 490 U.S. 228 490 U.S. 477, 484 510 U.S. 802 530 U.S. 133, 143 539 U.S. 90 544 U.S. 228, 240 Circuit Courts 750 F.2d 703, 709 761 F.2d 204, 206 771 F.2d 1161, 1164 981 F.2d 388, 394-395 12 F.3d 845, 848 111 F.3d 64, 66 141 F.3d 1270, 1278 170 F.3d 833, 842-843 207 F.3d 523, 526 208 F.3d 1303, 1305 215 F.3d 848, 852 253 F.3d 1052, 1062 271 F.3d 718, 724 359 F.3d 330, 340 364 F.3d 160, 164 376 F.3d 305, 312-313 387 F.3d 733, 736 391 F.3d 506, 512 439 F.3d 782, 785 512 F.3d 455, 459