Gary A. Thiessen, Plaintiff-appellant, v. General Electric Capital Corporation, Doing Business As Ge Capital, and Its Representatives; Montgomery Ward Credit Services, Inc., Formerly Known As Monogram Retailer Credit Services, Inc., a Subsidiary of General Electric Capital Corporation, and Its Representatives, Defendants-appellees,american Association of Retired Persons; National Employment Lawyers Association; Equal Employment Advisory Council, Amici Curiae, 255 F.3d 1221 (10th Cir. 2001)