Poster printed with red ink on white paper. Text aligned at top left reads, "Open All the Files in the Rosenberg-Sobell Case." A reproduction of a drawing by Picasso of Ethel and Julius Rosenberg appears below. Text aligned at center left reads, "In Tribute to Ethel & Julius Rosenberg on the 23rd Anniversary of their Execution / Join the Fight to Expose the Government's Conspiracy Today to Suppress our Constitutional Rights." Small text at bottom left notes the date and location of Tuesday, June 15 at Carnegie Hall with a list of performers including Michael & Robert Rosenberg and Helen & Morton Sobell. A phone number is provided for more information.