<blockquote><font class="small">In reply to:</font><hr /><p>"I was referring to this: >It was released publicly at the conference. It is public knowledge. < " <br /><br />I stand corrected. Thanks. <p><hr /></p></p></blockquote><br /><br />Sorry for coming into this thread late. Although it appears you both have settled on the differences, it is not clear to me.<br /><br />The paper was published in the AIAA Joint Propulsion Conference (JPC) in July, 2005. By definition, authors had to have NASA as well as Boeing permission to publish the paper and clear for public released of what we called "export-controlled information" (this involved with branch of office that deals with the U.S. State Department). The nature of conference, however; is geared toward aerospace propulsion professionals, therefore not many news reporters presence. Most of them would have no clue on various subject matter anyhow. The paper, by itself, is not a "publicity released" news package for the press. Perhaps this is what Chris (shuttle_RTF) was focusing on.<br /><br />So I agreed with Shuttle_Guy that this information was "released to the public' (yes even a foreigner such as a brit can get a copy <img src="/images/icons/laugh.gif" />). However; I think the phrase "public release" means something unique in the journalistic world that Chris (shuttle_RTF) was sensitive about. <br /><br />Botome line - you could've obtain a copy of paper for FREE simply by asking the author for it during the meeting, or a PDF file as a courtesy copy from the author, or you can purchase a CD from AIAA and obtain ALL the papers published in this JPC meeting. As far as the author is concerned, the information was "cleared" for public release and AIAA owns the copyright of that paper. Eventually, it shows up on AIAA website and anyone who pays for a subscription service can download that paper, plus all previous published papers, with a click of mouse.<br /><br />But here is my personal insight - why don't you ask Shuttle_Guy <div class="Discussion_UserSignature"> </div>