A two-part chronicle of the design and construction (which continues) of the International Space Station. In Part 1, "The Journey Begins" fitfully as NASA and Boeing, the main contractor, struggle with cost overruns. Money woes also bedevil NASA's Russian partners, and there are difficulties between U.S. scientists and engineers and their former Cold War foes. Then there's the matter of selling the idea to skeptics. The fundamental question, says one Boeing official, is "Why are you doing this?"