Demonstration of air attacks by American bomber fighter planes.

Searchlights and sirens at night. B-18s at Mitchel Field taxiing in and airmen looking at map. Cameramen at the field. Airmen boarding B-18 and B-18 taking off. Showing sky watchers at posts, switchboard operators, wall map and controllers in air control center. Pilots moving out of Air Control Center to demonstrate air combat. Aircraft P-40Cs and B-18s flying over New York.