This is the reverse side of a WWII-era souvenir postcard from San Antonio, Texas, printed by the Jumbo Post Card Company. The card advertises an aerial view of the Alamo and surrounding landmarks on its opposite face, while this side carries the well-known wartime 'Keep 'Em Flying' aircrew emblem and the home-front security reminder: 'The ENEMY is listening -- Don't SAY it. The ENEMY can READ -- Don't WRITE it.' Such printed security slogans were common on stationery and postcards during World War II, reflecting official efforts to prevent servicemen and civilians from inadvertently disclosing sensitive information in personal correspondence. Project: 218348