sentences:  He quotes the official history of the U.S. Army Air Forces' brief reference to the Eighth Air Force attack on Royan and also, in the same chapter, to the bombing of Plzeň in what was then Czechoslovakia.The official history stated that the Skoda works in Pilsen "received 500 well-placed tons," and that "because of a warning sent out ahead of time the workers were able to escape, except for five persons.