"What about my CAPCOM question.........when have non Astronauts been used? "<br /><br />Sorry Shuttle_Guy, I missed that. On ISS, we have used non astros for the last several years. Usually training people or military types. We use training leads since they spend a great deal of time with the astronauts so they know their concerns, ways of thinking, build a relationship etc. It is extremely important. As to your comment about it being make work in the days of the Original 7... that is not true. They did, and do, really need someone versed/trained/familiar with the mindset of the astronaut. In the control room we view them as the rep or proxy for the person on board. Everyone else thinks like an engineer - they think like an astronaut. The non-astro CAPCOMS have generally not gotten as high marks for these reasons though some do pretty darn good. Also, in special cases the flight controller has been enabled to talk directly to the crew.