While you may think the "ruby" slippers Judy Garland wore as Dorothy in The Wizard of Oz would be an ample Smithsonian artifact to mark the 40th anniversary of the Stonewall Riots, there's plenty more. Step into the National Museum of American History and make your way to the entrance of the Archives Center. Adjacent the entrance you'll find a collection of GLBT memorabilia -- artifacts? -- marking the anniversary. There's the chilling 1981 copy of New York Native bearing the headline, "Cancer in the Gay Community." Or, for a happier note, take a gander at the cover of the brochure from the 1987 Gay Men's Chorus of Washington concert, "Let Freedom Ring," with the Denver Women's Chorus and Lesbian and Gay Bands of America. In all, a tiny rainbow of treasures. On display through Aug. 2. At 14th Street & Constitution Avenue NW. Visit americanhistory.si.ed or call 202-633-1000.