I just watched this 1994 Documentary about NASA'a Space Shuttle(s) and never realized just how much is involved. This is a must see for those who really don't know how intense and detailed the Shuttle Program is. With the hundreds of involved technical aspects and programing that goes into it at every moment. And just how sensitive and fragile every piece of the puzzle is, and their are so many. You can also come away making your own conclusions about the two prior accidents, Challenger & Columbia. Nothing is mentioned of them in the Doc. Nothing needs to be said. Once you see all that's involved in making these "machines" do what they do, you will probably agree that two accidents in 25 years of service and operation is quite amazing. Amazing that there have not been more. The Shuttle's have done quite a job. Though, personally, I'm ready to see space technology and travel move ahead to the next phase to whatever that may be.