"""shoot up sky in target practice, fort macarthur, cal. - mobile coast artillery battery tests rapid-fire air defense"" / two small airplanes far away... - artillery stock videos & royalty-free footage"
{"Image ImageDescription": "Title card: \"Shoot up sky in target practice, Fort MacArthur, Cal. - Mobile coast artillery battery tests rapid-fire air defense\" / Two small airplanes far away in the sky / Military men at a movie camera with a man speaking through a megaphone / Numerous anti-aircraft guns firing with puffs of smoke near the planes / Men quickly shooting and reloading the guns / Note: exact month/day not known", "Image Copyright": "Grinberg"}