Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Safeguarding Military Information was a short propaganda film produced by the Academy of Motion Picture Arts and Sciences in 1942.The film opens with a dramatic explosion of a ship by two undercover saboteurs and then fades into a written "Thoughtlessness Breeds Sabotage" message. A short vignette comes next with a sailor with his girlfriend on the telephone at a bar. As he placates her suspicions by telling her that he is sailing to Hawaii on the USS Navajo at 10:30 pm. A man with a radio disguised as a hearing aid is sitting next to him, and he sends the message to his confederates speaking in code with an enemy submarine, which blows up the ship.