When revolution crumbled the dictatorial reign of Mexican President Porfirio Diaz in 1910, the country's pioneer photographers had their box cameras, bulb releases, and glass plates ready. From their sepia-toned pictures stare Pancho Villa, Emiliano Zapata, and many rebels of lesser renown. Mexico City visitors interested in history and photography can find a poignant record of the era at the Museo Nacional de la Revolucion and at a gallery in the Zona Rosa. Both have opened in ...