On the 60th anniversary of the blacklisted film Salt of the Earth, unionists, scholars and Chicano activists mark the milestone with celebrations. The film portrays a real life strike of Chicano mine workers in New Mexico and the revolutionary role their wives played in the picket lines. Rosaura Revueltas, the Mexican actress who starred in the movie, was arrested and deported. Today, the film is preserved in the Library of Congress as a historic document.