RIP Giant Machine That Put Space Shuttles on Top of 747sAdam Clark Estes2/05/15 3:10pm255EditPromoteGo to permalinkIt's a great American tradition. When something is old and less useful than it once was, we just tear it down to make room for new and more useful things. That's exactly what's happened to the Mate-Demate Device (MDD) at NASA's Kennedy Space Center. It used to mount Space Shuttles on 747s. Now it's scrap metal.