“The Contraband Crate” also published as “Boomerange Bomber” by L. Ron Hubbard
Publication date: August 1935
Original publication: Sky Birds
Genre: Historical Fiction
Story description: An American pilot, charged with the delivery of a bomber to Shanghai, unwittingly becomes a part of US intelligence operation that almost costs him his life.
Currently available as part of the Stories from the Golden Age series, in the title Sky-Crasher.