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Item set
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Sound guides rocket bomb against enemy aircraft Sound guides rocket bomb against enemy aircraft -
Streamline motors for streamline planes Streamline motors for streamline planes -
Army flying cadets see plane structure through open panel Army flying codest see plane structure through open panel -
U. S. Bombers Uncle sam builds a europe and back warplane -
Bulletprof tire heals own wounds in army test Bulletprof tire heals own wounds in army test -
Balloon flights train navy airman Balloon flights train navy airman -
Industry goes to war Industry goes to war -
Uncle Sam drills parachute troops Uncle sam drills parachute troops -
Mobile pill box fortress mounts two six inc guns Mobile pill box fortress mounts two six inc guns -
Bombers beware! Bombers beware! -
Army shooting match tests new rifles Army shooting match tests new rifles -
Uncle sam vaccum packs his gas masks Uncle sam vaccum packs his gas masks -
Bombers or battleships Bombers or battleships -
New "ears" listen for enemy planes New airs listen for enemy planes -
New experiments with rockets New experiments with rockets -
U.s. army gets a new anti aircraft gun U.S. army gets a new anti aircraft gun -
Coastal artillery Can we defend our coasts? -
Uncle sam's shooting gallery Uncle sam's shooting gallery -
Flyers by the ten thousand Flyers by the ten thousand -
Enlarging the panama canal for bigger battleship Enlarging the panama canal for bigger battleship -
Machine-gun skeet makes flying marksmen Title: Machine-gun skeet makes flying marksmen -
Bottles serve as bombs for use against tanks Bottles serve as bombs for use against tanks -
Training air defence gunners Training air defence gunners -
Plastic airplanes revolutionize aircraft design Plastic airplanes revolutionize aircraft design -
New wonders from electrons New wonders from electrons