Well this article was a decent read right up to the fuel point where we went into discussing a theoretical fuel that doesn't exist for us currently, known as antimatter. Antimatter has only been theorized currently and has not been found or proven to even actually exist at this point in time. Its purely a fuel used in science fiction shows and nothing else. So while you had some interesting points, they were all overshadowed by your lack of knowledge of what is actually real. Just assuming that antimatter is actually real and that we have it when discussing current concerns of space travel is just a bad idea since we don't know it for a fact if it can actually exist, or what would really happen with it if it did exist. I mean your assuming it exists and could be handled when infact if it does exist it may not even be possible to handle it, or it may not be nearly as volatile as people expect in which case it could be a very poor energy producer.