Josh-<br /><br />The SRB's are going to be the easy part, the SSDV is going to keep using them.<br /><br />As far as a team of engineers in 20 years new to the Shuttle not being able to depreserve one and getting it spaceworthy again, I think you underestimate the skill and smarts of motivated people. Nothing about the Orbiters is magic. When a machine like that is put in long term preservation it's not just towed into a hanger, and the lights turned off. They are taken apart, and every piece bagged, tagged, and cataloged. It's as much as an administrative action as a mechanical one. I've heard stories that we couldn't start building Saturns again, not because the tooling was destryed, but because the "know-how" has been lost. I think that is a giant load of organic compost, there is no doubt in my mind that a decent team of engineers could get the Saturns back into production, with the same level of performance and reliablity that the Saturns had 40 years ago.<br /><br /><font color="yellow">Limiting down-mass doesn't limit the experiments that can be done by much. The whole purpose of the ISS is that experiments can be done and analized in space, rather than ferrying stuff back and forth. You never answered the question of what would have to come down in the unpressurized STS cargo bay to justify the expense.</font><br /><br />My goal for the space program isn't limited to endless experimentation. I'm a space exploitation kind of guy. Right now our program is too wimpy to require a large payload bay, just like the airline passenger market to Des Moins, Iowa doesn't justify runing a 747 in there every hour. However, I refuse to believe that our Space Progam will always be to wimpy to require bringing back something bigger than a breadbox, and when that day comes, we are going to be thankfu that we kept the only hardware ever built that can do it. <div class="Discussion_UserSignature"> </div>