聯合服務組織往往會振奮軍人的士氣，圖中這些來自肯塔基諾克斯堡壘 (Fort Knox) 的M-4坦克駕駛員們就是如此

出處: Palmer, Alfred T., photographer. "M-4 tank Crews of the United States, Ft. Knox, Kentucky." June 1942. America from the Great Depression to World War II: Color Photographs from the FSA-OWI, 1935-1945, American Memory collections, Library of Congress.