Propaganda used to influence soldiers and citizens alike to fight harder in the war 

p.s sorry if it's hard to see for you 

American Propaganda 

Hell Above Earth tells an unforgettable story of two World War II American bomber pilots who forged an unexpected but enduring bond in the flak-filled skies over Nazi Germany. But there's a twist: one of them was related to the head of the Luftwaffe, Reich Marshal Herman Goering, and the other had secret orders from FBI Director J. Edgar Hoover, to kill him if anything went wrong during their missions.A heart-wrenching Greatest Generation buddy story, an adrenaline-filled account of aerial combat, and a work of popular history, Hell Above Earthcenters around the author's discovery of a half-century old secret that has far-reaching and deeply personal repercussions for the pilots, and profound consequences for the FBI and the "Mighty" Eighth Air Force.

Hell Above Earth 

Used to inform or even scare citizens in to all ways having a gas mask on hand  