NASA reveals delay for Hubble successor
What really baffes me about megaprojects like the Webb telescope is that they do decades of research and design, build ONE and then disassemble the teams and jigs.Since all the design and tool-up costs are sunk, why not build two or three?  Even just as components.Otherwise if we get to March 2020 and the launch fails, or the scope or shade doesn't deploy, that's $8 billion down the drain.