Four Freedoms and Arsenal of Democracy posters. The Arsenal of Democracy panel at the National and Civilian Defense Exposition is readied by workmen. Only half the panel is shown here. This and a montage representing the Four Freedoms were designed by Jean Carlu, eminent psoter artist. Each measures 15 x 30 feet and is divided into 2 1/2 foot squares. These panels display a novel new montage technique used only once before. Displayed under the aegis of the Office of Emergency Management (OEM), theyl will be shortly seen at exhibitions in a number of cities from coast to coast