Paul G. Thomasson, Lieutenant, United States Navy, Plaintiff-appellant, v. William J. Perry, Secretary of Defense; John H. Dalton,secretary of the Navy, Defendants-appellees,union of American Hebrew Congregations; the American Jewishcongress; National Organization for Women; Now Legaldefense and Education Fund; Center for Women Policystudies; National Lesbian and Gay Law Association; Gay Andlesbian Advocates and Defenders; American Civil Libertiesunion; Lambda Legal Defense and Education Fund;servicemembers Legal Defense Network; Iaomai, Incorporated;family Research Council; Iota Legal Defense Fund, Amici Curiae