Lead Belly (Huddie William Ledbetter) and John Lomax reenact scenes from the past in their relationship. Lead Belly walks down a hall and knocks before he enters a room carrying a guitar. Lomax is working at a typewriter. He is coached regarding his lines. There is a knock on the door and Lomax says "come in." Lomax is coached some more about his lines. Scene shifts. Knock at door, and Lead Belly enters, saying "Boss, here I is." He states that the Governor pardoned him because Lomax sent him a recording of his songs, and he asks Lomax to employ him for life. Lomax declines, calling Lead Belly "a mean boy" because he killed two men. Lead Belly claims that he has changed and promises to be his driver and to sing for him. Lomax hires him.
Year 1938. Adolf Hitler gives speech. U.S. Army Major General Henry (Hap) Arnold is appointed Chief of the U.S. Army Air Corps. President Franklin D. Roosevelt with General Arnold in an open car, inspecting a new bomber. Sketches of various airplanes proposed to modernize the U.S. Army Air Corps, including Northrup A-17-A; Bell P-39; and Douglas B-23. Views of U. S. Army pursuit airplanes and North American BC-1 training aircraft. Paratroopers jump from C-47 aircraft. A P-38 lightning airplane maneuvers in flight.
Japanese attack on Pearl Harbor. U.S. Army Air Corps Chief, General Arnold created Civilian Contract flying schools to train pilots. Recruits seen entering Spartan School of Aeronautics, Air Corps Training Detachment. Trainees being issued parachutes. Student pilots flying in Stearman training airplanes. P-51 mustang airplanes taxiing and in flight. Brigadier General Jimmy Doolittle's bombing raid on Tokyo. General Arnold sitting with General Doolittle. President Franklin Roosevelt presenting the Medal of Honor to General Doolittle. Army Air Corps flyers being decorated by General Arnold. Scenes of air war in Europe from gun cameras of American aircraft. Lieutenant General Arnold mingling with air crews at an air base. An aircraft plant building B-17 Flying Fortress bombers. General Arnold with War Production Chief, Bill Knudsen.
General Henry Arnold dispenses with his prepared remarks and gives impromptu speech about air power. General Arnold at the Casablanca conferences, seen with President Roosevelt and General Marshall and other Allied military leaders. British bombers departing on nighttime bombing raids. A submarine surfacing. Newspaper headlines report German torpedoing of the ships, SS Robin Moor and SS Sessa. B-24 Liberator bombers taxiing and in flight on antisubmarine missions. General Arnold consulting with General Joseph Stilwell and Claire Chennault. They walk in front of line of P-40 Flying Tiger aircraft with tiger teeth painted on their noses. Snow-covered Himalaya Mountains.
Training film The Wizardry of Wireless, on radio transmission and reception. View of a diagram with Grid Potential written on it. The oscillating action causes the antenna current to alternate. Alteration depends on turns of wire in the coil. Man demonstrates the direction of current flow on instrument. Animated picture of the electromagnetic waves from a tower. The transmitters are connected and antenna current passes through them. Diagram with sound waves, battery and the transmitter.
Radio transmission and reception. Electromagnetic waves come in contact with antenna. Animation shows electromagnetic waves passing. A tuning coil is placed in antenna for better connectivity. This process adjusts antenna frequency. Diagram shows the tuning coil with a pendulum. The dots traveling on circuit show the frequency of reception. Diagram shows water line and the pebble. The filament circuit heats up. Incoming waves in the grid. Man holds torch in hand and opens it. Coil is placed on each end of magnet. Sound waves reduced from entering the diaphragm.
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