An oversized wartime postcard advertising 'Air View San Antonio, Texas,' home to a cluster of Army airfields including Kelly, Randolph, and Brooks Fields. The card's 'Keep 'Em Flying' emblem and security warning -- 'The Enemy is listening, don't say it' -- reflect the blend of civic pride and wartime vigilance that defined home-front life near America's military training hubs during World War II. Project: 218515