I am certainly no expert, but it would probably be quite unreliable to compare these two projects. Not only has 30 years lapsed since that time, but those missiles (I believe) were above ground missiles. The incredible advances in technology would suggest that we have now overcome obstacles, such as temperature concerns.
Chena, I don't use the <> thing. My first post was nothing more then a JOKING reference to how difficult the weather extremes can be in and around Greely.