Impressive demonstration of largest concentration of anti-aircraft searchlight equipment in America.
United States of America. No story title. Introductory intertitle reads: "Eyes made to sweep the sky for hostile planes - giant searchlights with millions of candlepower behind them." L/S of group of men working to move large searchlights on wheels off a truck. Narrator states that they are the coast artillery, engineers and air corps working together at Fort Humphries (?) Virginia testing the greatest concentration of anti-aircraft searchlight equipment in American history. 15 searchlights are placed in their operating positing. "And when night falls, their beams pierce the sky - the electric eyes of the earth folk in their battle with the air men..." Night shot of one of the lamps lighting up. Night shot of a whole line of the lamps lit up. Men at work operating the "sound locator", the instrument with which enemy planes are first detected. Various shots of lights being used to pick out an aircraft. Rather impressive.