In 1979 the US Department of Energy sued to suppress the publication of an article by Howard Morland in "The Progressive" magazine detailing design information on thermonuclear and fission nuclear weapons he was able to glean in conversations with officials at several DoE contractor plants active in manufacture of nuclear weapons components. Ray Kidder, a nuclear weapon designer testifying for Morland, identified several open literature sources for the information Morland repeated in his article, while aviation historian Chuck Hansen produced a similar document for US Senator Charles Percy. Morland and "The Progressive" won the case, and Morland published a book on his journalistic research for the article, the trial, and a technical appendix in which he "corrected" what he felt were false assumptions in his original article about the design of thermonuclear weapons in his book, "The Secret That Exploded". The concepts in Morland's book are widely acknowledged in other popular-audience descriptions of the inner workings of thermonuclear weapons.